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Vulnerable Ports

This list (a very small part of our SG Ports database) includes TCP/UDP ports currently tested by our Security Scanner, and corresponding potential security threats. We update the list on a regular basis, however if you feel we should add other port(s) to the list or modify their descriptions, please . Any feedback and suggestions can also be posted to our Security forum.

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Port(s) Protocol Service Scan level Description
 6120 tcp games not scanned Starcraft uses ports 6110-6120
 6121 tcp spdy not scanned SPDY for a faster web, Ragnarok Online Server (TCP/UDP)
 6124 tcp,udp games not scanned Against Rome, developer: Independent Arts
 6125 tcp,udp applications not scanned Librdmacm is a Library for managing RDMA connections. librdmacm is prone to a security vulnerability because of a design error that causes the library to always connect to default port 6125 if the '/var/run/ibacm.port' file is not found. An attacker may exploit this issue to send malicious address resolution information to the applications using the affected library. This may aid in other attacks. To successfully exploit this issue, an attacker must be able to run a rogue 'ib_acm' service on port 6125 on a server which affected clients may connect to.
References: [CVE-2012-4516] [BID-55896]
 6129 tcp dameware Premium scan W32.mockbot.a.worm [Symantec-2004-022608-5242-99]

Dameware (Solarwinds) - Buffer overflow in DameWare Mini Remote Control before 3.73 allows remote attackers to execute arbitrary code via a long pre-authentication request to TCP port 6129.
References: [CVE-2003-1030], [BID-9213], CERT Vulnerability Note VU#909678.
 6130 tcp damewaremobgtwy not scanned IANA registered for: The DameWare Mobile Gateway
 6133 tcp,udp wol not scanned Net Boundary Tech WOL
 6136 tcp applications not scanned ObjectDB database server
 6144 tcp,udp games not scanned PlayLink online game
 6150 tcp,udp games not scanned MTX Mototrax, developer: Aspyr
 6151 tcp,udp games not scanned MTX Mototrax, developer: Aspyr
 6159 tcp efb-aci not scanned EFB Application Control Interface
 6160 tcp,udp ecmp not scanned Veeam Backup and replication suite uses these ports, in addition to common 80, 443, etc.:
6160 TCP - Veeam installer service
6165 TCP - WAN accelerator
6180 TCP/UDP - Veeam cloud gateway
6169, 8190, 8191 TCP - used by SP backup server
10003 TCP - communication with Veeam backup service

IANA registered for: Emerson Extensible Control and Management Protocol
 6161 tcp,udp patrol-ism not scanned Veeam vPower NFS Service (TCP)

Multiple buffer overflows in ASG-Sentry Network Manager 7.0.0 and earlier allow remote attackers to execute arbitrary code or cause a denial of service (crash) via a long request to FxIAList on TCP port 6162, or an SNMP request with a long community string to FxAgent on UDP port 6161.
References: [CVE-2008-1320], [BID-28188]

Port also IANA registered for PATROL Internet Srv Mgr
 6162 tcp,udp patrol-coll not scanned Veeam Data Mover (TCP)

Multiple buffer overflows in ASG-Sentry Network Manager 7.0.0 and earlier allow remote attackers to execute arbitrary code or cause a denial of service (crash) via a long request to FxIAList on TCP port 6162, or an SNMP request with a long community string to FxAgent on UDP port 6161.
References: [CVE-2008-1320], [BID-28188]

The FxIAList service in ASG-Sentry Network Manager 7.0.0 and earlier does require authentication, which allows remote attackers to cause a denial of service (service termination) via the exit command to TCP port 6162, or have other impacts via other commands.
References: [CVE-2008-1321]

PATROL Collector (IANA official)
 6163 tcp,udp pscribe not scanned Veeam Hyper-V Integration Service

Precision Scribe Cnx Port (IANA official)
 6164 tcp applications not scanned Veeam WAN Accelerator
 6165 tcp veeam not scanned Veeam Backup and replication suite uses these ports, in addition to common 80, 443, etc.:
6160 TCP - Veeam installer service
6165 TCP - WAN accelerator
6180 TCP/UDP - Veeam cloud gateway
6169, 8190, 8191 TCP - used by SP backup server
10003 TCP - communication with Veeam backup service
 6167 tcp applications not scanned Veeam Log Shipping Service
 6169 tcp veeam not scanned Veeam Backup and replication suite uses these ports, in addition to common 80, 443, etc.:
6160 TCP - Veeam installer service
6165 TCP - WAN accelerator
6180 TCP/UDP - Veeam cloud gateway
6169, 8190, 8191 TCP - used by SP backup server
10003 TCP - communication with Veeam backup service
 6170 tcp applications not scanned Veeam Mount Server
 6177 tcp applications not scanned Unspecified vulnerability in the Cluster Management component in IBM PowerHA 5.4, 5.4.1, 5.5, and 6.1 on AIX allows remote attackers to modify the operating-system configuration via packets to the godm port (6177/tcp).
References: [CVE-2009-3900] [BID-36931] [SECUNIA-37267]
 6180 tcp veeam Premium scan Veeam Backup and replication suite uses these ports, in addition to common 80, 443, etc.:
6160 TCP - Veeam installer service
6165 TCP - WAN accelerator
6180 TCP/UDP - Veeam cloud gateway
6169, 8190, 8191 TCP - used by SP backup server
10003 TCP - communication with Veeam backup service

Marketcircle Daylite Server (Mac OS.X CRM system) client synchronization requests use port 6180

Port also commonly used by some phishing scam sites
 6187 tcp trojans Members scan Tilser trojan (2004.02.27) - gives an attacker complete access to your computer, opens a backdoor on TCP port 6187.
 6201 udp thermo-calc not scanned Management of service nodes in a processing grid for thermodynamic calculations [Thermo-Calc Software] (IANA official)
 6209 tcp,udp qmtps not scanned QMTP over TLS (IANA official)
 6217 tcp,udp games not scanned Dark Vengeance
 6220 tcp,udp applications not scanned A vulnerability has been identified in SINEMA Remote Connect Server (All versions < V3.0 SP2). Affected application is missing general HTTP security headers in the web server configured on port 6220. This could aid attackers by making the servers more prone to clickjacking, channel downgrade attacks and other similar client-based attack vectors.
References: [CVE-2022-27220]
 6257 udp winmx Members scan port used by the WinMX P2P file sharing software. It also uses port 6699/tcp.
 6260 tcp,udp applications not scanned planet M.U.L.E.
 6262 tcp,udp applications not scanned Advantage Database Server, Security Manager Plus, Web Callback Standard Protocol, License Server (Poseidon for UML)

Sybase Advantage Server is vulnerable to a stack-based buffer overflow, caused by improper bounds checking by the ADS process. By sending specially-crafted packets to UDP port 6262, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the server to crash.
References: [XFDB-68250], [OSVDB-73728], [BID-48464], [SECUNIA-45069]
 6267 tcp trojan Premium scan DarkSky trojan

IANA registered for: GridLAB-D User Interface
 6272 tcp trojan Premium scan Secret Service
 6295 tcp applications not scanned Directory traversal vulnerability in the bootstrap service in Cisco Unified Contact Center Express (UCCX) allows remote attackers to read arbitrary files via a crafted bootstrap message to TCP port 6295.
References: [CVE-2010-1571], [BID-40680]
 6306 tcp,udp ufmp not scanned Unified Fabric Management Protocol
 6308 tcp plesk not scanned Plesk sw-cp-server (since version 12.0)
 6315 tcp scup not scanned Sensor Control Unit Protocol
 6315 udp scup-disc not scanned Sensor Control Unit Protocol Discovery Protocol
 6317 tcp,udp nav-data not scanned Navtech Radar Sensor Data (IANA official)
 6318 tcp iona-data not scanned IONA Measurement and control data (IANA official)
 6320 tcp,udp repsvc not scanned IANA registered for: Double-Take Replication Service
 6324 tcp,udp hrd-ncs not scanned W32.Longbe@mm [Symantec-2004-033115-2633-99] (2004.03.10) - a worm that attempts to download files and execute them. It also contains a backdoor that allows an attacker to remotely execute commands on an infected computer. The worm listens on TCP port 6324.

Hall Research Device discovery and configuration also uses this port.

IANA registered for: HR Device Network Configuration Service.
 6325 tcp dt-mgmtsvc not scanned Double-Take Management Service [Vision_Solutions] (IANA official)
 6326 tcp dt-vra not scanned Double-Take Virtual Recovery Assistant [Vision_Solutions] (IANA official)
 6331 udp applications not scanned Windows Live OneCare (WinSs.exe)
 6338 tcp applications not scanned In NICE Engage through 6.5, the default configuration binds an unauthenticated JMX/RMI interface to all network interfaces, without restricting registration of MBeans, which allows remote attackers to execute arbitrary code via the RMI protocol by using the JMX connector. The observed affected TCP port is 6338 but, based on the product's configuration, a different one could be vulnerable.
References: [CVE-2019-7727]
 6343 udp openflow not scanned MikroTik RouterOS uses this port for OpenFlow traffic.

OpenFlow/sFlow - open network messaging standard that creates a format for notifications generated by networking equipment (routers, switches) to be picked by monitoring software for analyzis of traffic and congestion. Competing product to NetFlow owned by Cisco. OpenFlow controllers listen for switches on port 6653/tcp (earlier versions used port 6633/tcp).

NetFlow common UDP ports: 2055, 2056, 4432, 4739, 9995, 9996, and 6343.
 6344 tcp streletz not scanned IANA registered for: fire-prevention systems
 6346 tcp,udp gnutella-svc not scanned Gnutella (FrostWire, Limewire, Shareaza, etc.), BearShare file sharing app
 6347 tcp,udp gnutella-rtr not scanned Gnutella2 file sharing protocol, gnutella-rtr, Gnutella alternate
 6348 tcp,udp gnutella not scanned Gnutella Proxy, Bearshare, Limewire, FrostWire, Files sharing, p2p
 6350 tcp,udp adap not scanned App Discovery and Access Protocol
 6351 tcp trojans not scanned Backdoor.Padmin [Symantec-2003-090917-0935-99] (2003.05.21) - a trojan horse that has backdoor capabilities.

W32.HLLP.Shodi.B [Symantec-2004-042012-2931-99] (2004.04.20) - a virus that prepends itself to the files that have a .exe extension
 6352 tcp virus not scanned W32.HLLP.Shodi.B [Symantec-2004-042012-2931-99] (2004.04.20) - a virus that prepends itself to the files that have a .exe extension.
 6363 udp ndn not scanned IANA registered for: Named Data Networking
 6379 tcp redis not scanned An advanced key-value cache and store

A vulnerability in the health check RPM of Cisco IOS XR Software could allow an unauthenticated, remote attacker to access the Redis instance that is running within the NOSi container. This vulnerability exists because the health check RPM opens TCP port 6379 by default upon activation. An attacker could exploit this vulnerability by connecting to the Redis instance on the open port. A successful exploit could allow the attacker to write to the Redis in-memory database, write arbitrary files to the container filesystem, and retrieve information about the Redis database. Given the configuration of the sandboxed container that the Redis instance runs in, a remote attacker would be unable to execute remote code or abuse the integrity of the Cisco IOS XR Software host system.
References: [CVE-2022-20821]

Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. It has been discovered that an unprivileged pod in a different namespace on the same cluster could connect to the Redis server on port 6379. Despite having installed the latest version of the VPC CNI plugin on the EKS cluster, it requires manual enablement through configuration to enforce network policies. This raises concerns that many clients might unknowingly have open access to their Redis servers. This vulnerability could lead to Privilege Escalation to the level of cluster controller, or to information leakage, affecting anyone who does not have strict access controls on their Redis instance. This issue has been patched in version(s) 2.8.19, 2.9.15 and 2.10.10.
References: [CVE-2024-31989]
 6384 tcp worm Members scan W32.HLLW.Gaobot
 6385 tcp applications not scanned OpenStack Ironic main API port
 6387 tcp,udp applications not scanned Spytech Spynet Chat Server 6.5 allows a remote attacker to create a denial of service (crash) via a large number of connections to port 6387.
References: [BID-2701], [CVE-2001-0581], [XFDB-6509]
 6388 tcp,udp applications not scanned Ironic-image is an OpenStack Ironic deployment packaged and configured by Metal3. When the reverse proxy mode is enabled by the `IRONIC_REVERSE_PROXY_SETUP` variable set to `true`, 1) HTTP basic credentials are validated on the HTTPD side in a separate container, not in the Ironic service itself and 2) Ironic listens in host network on a private port 6388 on localhost by default. As a result, when the reverse proxy mode is used, any Pod or local Unix user on the control plane Node can access the Ironic API on the private port without authentication. A similar problem affects Ironic Inspector (`INSPECTOR_REVERSE_PROXY_SETUP` set to `true`), although the attack potential is smaller there. This issue affects operators deploying ironic-image in the reverse proxy mode, which is the recommended mode when TLS is used (also recommended), with the `IRONIC_PRIVATE_PORT` variable unset or set to a numeric value. In this case, an attacker with enough privileges to launch a pod on the control plane with host networking can access Ironic API and use it to modify bare-metal machine, e.g. provision them with a new image or change their BIOS settings. This vulnerability is fixed in 24.1.1.
References: [CVE-2024-31463]
 6389 tcp,udp clariion-evr01 not scanned IANA registered for: clariion-evr01
 6394 tcp worm Members scan W32.Spybot
 6400 tcp,udp boe-cms Premium scan Business Objects CMS contact port, info-aps, Seagate Crystal Reports

Trojans using this port: APStrojan (TCP), The Thing
 6401 tcp,udp boe-was not scanned Seagate Crystal Enterprise, boe-was, info-was
 6402 tcp,udp boe-eventsrv not scanned boe-eventsrv, info-eventsvr
 6403 tcp,udp boe-cachesvr not scanned boe-cachesvr, boe-cachesvr
 6404 tcp,udp boe-filesvr not scanned Business Objects Enterprise internal server, info-filesvr
 6405 tcp,udp boe-pagesvr not scanned Business Objects Enterprise internal server, info-pagesvr
 6406 tcp,udp boe-processsvr not scanned Business Objects Enterprise internal server, info-processvr
 6418 tcp syserverremote not scanned SYserver remote commands
 6419 tcp svdrp not scanned Simple VDR Protocol
 6430 tcp trojans Premium scan Backdoor.Mirab [Symantec-2002-062114-0920-99] (2002.06.21) - remote access trojan. Affects all current Windows versions. It uses port 4912 for direct control and port 6430 for file transfer by default.
 6432 tcp pgbouncer not scanned IANA registered for: PgBouncer - A connection pooler for PostgreSQL
 6436 tcp,udp applications not scanned LimeWire Client, Gnutella, PhatBox
 6440 tcp heliosd not scanned IANA registered for: heliosd daemon
 6443 tcp,udp sun-sr-https not scanned Kubernetes API server (TCP)

An Allocation of Resources Without Limits or Throttling vulnerability in SUSE k3s allows attackers with access to K3s servers' apiserver/supervisor port (TCP 6443) cause denial of service. This issue affects k3s: from v1.24.0 before v1.24.17+k3s1, from v1.25.0 before v1.25.13+k3s1, from v1.26.0 before v1.26.8+k3s1, from sev1.27.0 before v1.27.5+k3s1, from v1.28.0 before v1.28.1+k3s1.
References: [CVE-2023-32187]

A Allocation of Resources Without Limits or Throttling vulnerability in SUSE RKE2 allows attackers with access to K3s servers apiserver/supervisor port (TCP 6443) cause denial of service. This issue affects RKE2: from 1.24.0 before 1.24.17+rke2r1, from v1.25.0 before v1.25.13+rke2r1, from v1.26.0 before v1.26.8+rke2r1, from v1.27.0 before v1.27.5+rke2r1, from v1.28.0 before v1.28.1+rke2r1.
References: [CVE-2023-32186]

Service Registry Default HTTPS Domain (IANA official)
 6444 tcp,udp sge_qmaster not scanned Sun Grid Engine - Qmaster Service
 6445 tcp,udp sge_execd not scanned Sun Grid Engine - Execution Service, S4 Leage
 6446 tcp,udp mysql-proxy not scanned MySQL Proxy
 6454 udp applications not scanned Art-Net protocol
 6463 tcp discord not scanned Discord Rich Presence RPC server port - https://discordapp.com/developers/docs/topics/rpc

 6464 tcp,udp ieee11073-20701 not scanned IANA registered for: Port assignment for medical device communication in accordance to IEEE 11073-20701
 6475 tcp beebeep not scanned BeeBEEP - an open source, peer to peer, LAN chat messenger uses ports 6475/tcp (chat), 6476/tcp (file transfers) and 36475/udp.
 6476 tcp beebeep not scanned BeeBEEP - an open source, peer to peer, LAN chat messenger uses ports 6475/tcp (chat), 6476/tcp (file transfers) and 36475/udp.
 6489 tcp plesk not scanned Plesk migration agent (Windows only) uses port 6489/tcp
 6498 tcp,udp applications not scanned Netscape Conference H.323 HostCall
 6500 tcp games Premium scan GameSpy Arcade - query port

Also uses ports 3783, 6500, 6515 UDP, 6667, 13139 UDP, 27900 UDP, 28900, 29900, 29901

Buffer overflow in Munica Corporation NetSQL 1.0 allows remote attackers to execute arbitrary code via a long CONNECT argument to port 6500.
References: [CVE-2001-1163] [BID-2885]

Trojans using this port: Devil 1.03 (TCP)

BoKS Master (TCP/UDP) (IANA official)
 6500 udp games not scanned Dawn of War - Warhammer 40k, Command & Conquer: Red Alert 3
 6501 tcp,udp boks_servc not scanned BoKS Servc
Strat-O-Matic Baseball, Strat-O-Matic Basketball, Strat-O-Matic Football, Strat-O-Matic Hockey
 6502 tcp,udp boks_servm not scanned BoKS Servm, NetOp Remote Control (by Danware Data A/S), Netscape Conference H.323 HostCall

Buffer overflow in the Tape Engine (tapeeng.exe) in CA (formerly Computer Associates) BrightStor ARCserve Backup 11.5 and earlier allows remote attackers to execute arbitrary code via certain RPC requests to TCP port 6502.
References: [CVE-2006-6076], [BID-21221]

IANA registered for: Netop Business Solutions - NetOp Remote Control.
 6503 tcp,udp boks_clntd not scanned BoKS Clntd

Multiple Computer Associates products are vulnerable to a heap and stack-based buffer overflow, caused by improper bounds checking within the Message Engine RPC service (msgeng.exe). By sending a specially-crafted request to TCP port 6503, a remote attacker could overflow a buffer and execute arbitrary code on the system with SYSTEM privileges.

Multiple buffer overflows in CA BrightStor ARCserve Backup r11.5 SP1 and earlier, r11.1, and 9.01; BrightStor ARCserve Backup for Windows r11; BrightStor Enterprise Backup 10.5; Server Protection Suite r2; and Business Protection Suite r2 allow remote attackers to execute arbitrary code via crafted data on TCP port 6071 to the Backup Agent RPC Server (DBASVR.exe) using the RPC routines with opcode (1) 0x01, (2) 0x02, or (3) 0x18; invalid stub data on TCP port 6503 to the RPC routines with opcode (4) 0x2b or (5) 0x2d in ASCORE.dll in the Message Engine RPC Server (msgeng.exe); (6) a long hostname on TCP port 41523 to ASBRDCST.DLL in the Discovery Service (casdscsvc.exe); or unspecified vectors related to the (7) Job Engine Service.
References: [CVE-2006-5143] [BID-20365] [SECUNIA-22285]


Netop Business Solutions - NetOp School (IANA official)
 6505 tcp,udp badm_priv not scanned BoKS Admin Private Port
 6506 tcp,udp badm_pub not scanned BoKS Admin Public Port
 6507 tcp,udp bdir_priv not scanned BoKS Dir Server, Private Port
 6508 tcp,udp bdir_pub not scanned BoKS Dir Server, Public Port
 6511 udp dccp-udp not scanned Datagram Congestion Control Protocol Encapsulation for NAT Traversal [IESG] (IANA official) [RFC 6773]
 6513 tcp netconf-tls not scanned NETCONF over TLS [RFC 5539] (IANA official)
 6514 tcp syslog-tls not scanned Syslog over TLS [RFC 5425] (IANA official)
 6514 udp syslog-tls not scanned Syslog over DTLS [RFC 6012] (IANA official)
 6515 udp games not scanned GameSpy Arcade - Dplay UDP game data, Command & Conquer: Red Alert 3, Heroes of Might and Magic IV

Also uses ports 3783, 6500, 6515 UDP, 6667, 13139 UDP, 27900 UDP, 28900, 29900, 29901

IANA registered for: Elipse RPC Protocol (TCP/UDP)

Vulnerabilities listed: 100 (some use multiple ports)
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