CVE-2025-61951: BIG-IP DTLS 1.2 Vulnerability

Published Oct 15, 2025
·
Updated

Undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate.  This issue may occur when a Datagram Transport Layer Security (DTLS) 1.2 virtual server is enabled with a Server SSL profile that is configured with a certificate, key, and the SSL Sign Hash set to ANY, and the backend server is enabled with DTLS 1.2 and client authentication.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected Software

66 affected componentsFixes available
F5 BIG-IP=17.5.0, >=17.1.0<=17.1.2
17.5.117.1.3
F5 BIG-IP>=16.1.0<=16.1.6
16.1.6.1
F5 BIG-IP
F5 BIG-IP Access Policy Manager>=16.1.0<16.1.6.1
F5 BIG-IP Advanced Firewall Manager>=16.1.0<16.1.6.1
F5 Big-ip Advanced Web Application Firewall>=16.1.0<16.1.6.1
F5 BIG-IP Analytics>=16.1.0<16.1.6.1
F5 Big-ip Application Acceleration Manager>=16.1.0<16.1.6.1
F5 BIG-IP Application Security Manager>=16.1.0<16.1.6.1
F5 Big-ip Application Visibility And Reporting>=16.1.0<16.1.6.1
F5 Big-ip Automation Toolchain>=16.1.0<16.1.6.1
F5 Big-ip Carrier-grade Nat>=16.1.0<16.1.6.1
F5 BIG-IP Container Ingress Services>=16.1.0<16.1.6.1
F5 Big-ip Ddos Hybrid Defender>=16.1.0<16.1.6.1
F5 Big-ip Domain Name System>=16.1.0<16.1.6.1
F5 BIG-IP Edge Gateway>=16.1.0<16.1.6.1
F5 Big-ip Fraud Protection Service>=16.1.0<16.1.6.1
F5 Big-ip Global Traffic Manager>=16.1.0<16.1.6.1
F5 Big-ip Link Controller>=16.1.0<16.1.6.1
F5 Big-ip Local Traffic Manager>=16.1.0<16.1.6.1
F5 Big-ip Policy Enforcement Manager>=16.1.0<16.1.6.1
F5 BIG-IP SSL Orchestrator>=16.1.0<16.1.6.1
F5 Big-ip Webaccelerator>=16.1.0<16.1.6.1
F5 Big-ip Websafe>=16.1.0<16.1.6.1
F5 BIG-IP Access Policy Manager>=17.1.0<17.1.3
F5 BIG-IP Access Policy Manager=17.5.0
F5 BIG-IP Advanced Firewall Manager>=17.1.0<17.1.3
F5 BIG-IP Advanced Firewall Manager=17.5.0
F5 Big-ip Advanced Web Application Firewall>=17.1.0<17.1.3
F5 Big-ip Advanced Web Application Firewall=17.5.0
F5 BIG-IP Analytics>=17.1.0<17.1.3
F5 BIG-IP Analytics=17.5.0
F5 Big-ip Application Acceleration Manager>=17.1.0<17.1.3
F5 Big-ip Application Acceleration Manager=17.5.0
F5 BIG-IP Application Security Manager>=17.1.0<17.1.3
F5 BIG-IP Application Security Manager=17.5.0
F5 Big-ip Application Visibility And Reporting>=17.1.0<17.1.3
F5 Big-ip Application Visibility And Reporting=17.5.0
F5 Big-ip Automation Toolchain>=17.1.0<17.1.3
F5 Big-ip Automation Toolchain=17.5.0
F5 Big-ip Carrier-grade Nat>=17.1.0<17.1.3
F5 Big-ip Carrier-grade Nat=17.5.0
F5 BIG-IP Container Ingress Services>=17.1.0<17.1.3
F5 BIG-IP Container Ingress Services=17.5.0
F5 Big-ip Ddos Hybrid Defender>=17.1.0<17.1.3
F5 Big-ip Ddos Hybrid Defender=17.5.0
F5 Big-ip Domain Name System>=17.1.0<17.1.3
F5 Big-ip Domain Name System=17.5.0
F5 BIG-IP Edge Gateway>=17.1.0<17.1.3
F5 BIG-IP Edge Gateway=17.5.0
F5 Big-ip Fraud Protection Service>=17.1.0<17.1.3
F5 Big-ip Fraud Protection Service=17.5.0
F5 Big-ip Global Traffic Manager>=17.1.0<17.1.3
F5 Big-ip Global Traffic Manager=17.5.0
F5 Big-ip Link Controller>=17.1.0<17.1.3
F5 Big-ip Link Controller=17.5.0
F5 Big-ip Local Traffic Manager>=17.1.0<17.1.3
F5 Big-ip Local Traffic Manager=17.5.0
F5 Big-ip Policy Enforcement Manager>=17.1.0<17.1.3
F5 Big-ip Policy Enforcement Manager=17.5.0
F5 BIG-IP SSL Orchestrator>=17.1.0<17.1.3
F5 BIG-IP SSL Orchestrator=17.5.0
F5 Big-ip Webaccelerator>=17.1.0<17.1.3
F5 Big-ip Webaccelerator=17.5.0
F5 Big-ip Websafe>=17.1.0<17.1.3
F5 Big-ip Websafe=17.5.0

Event History

Oct 15, 2025
Advisory Published
via F5·11:01 AM
Data Sourced
via F5·11:01 AM
DescriptionSeverityWeaknessAffected Software
CVE Published
via MITRE·01:55 PM
Data Sourced
via MITRE·01:55 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·02:15 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2025-61951?

CVE-2025-61951 has a critical severity rating due to the potential for service disruption in affected systems.

2

How do I fix CVE-2025-61951?

To fix CVE-2025-61951, upgrade to the recommended F5 BIG-IP versions as specified in the advisory.

3

What versions of F5 BIG-IP are affected by CVE-2025-61951?

F5 BIG-IP versions 17.5.0, 17.1.0 to 17.1.2, and 16.1.0 to 16.1.6 are affected by CVE-2025-61951.

4

What is the main issue with CVE-2025-61951?

The main issue with CVE-2025-61951 is that it can cause the Traffic Management Microkernel (TMM) to terminate unexpectedly.

5

Is there a workaround for CVE-2025-61951?

Currently, no specific workaround is documented for CVE-2025-61951; upgrading to safe versions is recommended.

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