CVE-2025-55669
published 2025-10-15CVE-2025-55669: When the BIG-IP Advanced WAF and ASM security policy and a server-side HTTP/2 profile are configured on a virtual server, undisclosed traffic can cause the…
PriorityP343high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.36%
28.1th percentile
When the BIG-IP Advanced WAF and ASM security policy and a server-side HTTP/2 profile are configured on a virtual server, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| f5 | big-ip | >= 16.1.0 < 16.1.6 | 16.1.6 |
| f5 | big-ip | >= 17.1.0 < 17.1.2.2 | 17.1.2.2 |
| f5 | big-ip_advanced_waf | — | — |
| f5 | big-ip_application_security_manager | >= 16.1.0 < 16.1.6 | 16.1.6 |
| f5 | big-ip_application_security_manager | 17.1.0 – 17.1.2 | — |
| f5 | big-ip_asm | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv4.08.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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F5
CVE-2025-55669: When the BIG-IP Advanced WAF and ASM security policy and a server-side HTTP/2 profile are configured on a virtual ser...
vendor_f5·2025-10-15·CVSS 7.5
CVE-2025-55669 [HIGH] CWE-672 CVE-2025-55669: When the BIG-IP Advanced WAF and ASM security policy and a server-side HTTP/2 profile are configured on a virtual ser...
CVE-2025-55669: When the BIG-IP Advanced WAF and ASM security policy and a server-side HTTP/2 profile are configured on a virtual ser...
When the BIG-IP Advanced WAF and ASM security policy and a server-side HTTP/2 profile are configured on a virtual server, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Affected Products: BIG-IP ASM, BIG-IP Advanced WAF
Affected Versions: 16.1.0 - 16.1.6; 17.1.0 - 17.1.2
F5 Advisory Articles: K000150752
F5 References: https://my.f5.com/manage/s/article/K000150752
GHSA
GHSA-5r25-m2h9-w299: When the BIG-IP Advanced WAF and ASM security policy and a server-side HTTP/2 profile are configured on a virtual server, undisclosed traffic can caus
ghsa_unreviewed·2025-10-15
CVE-2025-55669 [HIGH] CWE-672 GHSA-5r25-m2h9-w299: When the BIG-IP Advanced WAF and ASM security policy and a server-side HTTP/2 profile are configured on a virtual server, undisclosed traffic can caus
When the BIG-IP Advanced WAF and ASM security policy and a server-side HTTP/2 profile are configured on a virtual server, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
No detection rules found.
No public exploits indexed.
Qualys
A Strategic Response to the F5 BIG-IP Nation-State Breach 2025
blogs_qualys·2025-10-18
A Strategic Response to the F5 BIG-IP Nation-State Breach 2025
## Table of Contents
CISAs KEV Inclusion Underscores the Severity of the F5 BIG-IP Breach
The Risk-Velocity Mismatch: F5 Patching Decelerates as Attacker Insight Accelerates
How Qualys Helps You Discover F5 Assets and Detect Related Vulnerabilities
Conclusion
In mid-October 2025, the cybersecurity landscape was dealt a severe blow. F5 disclosed a long-term, sophisticated breach by a nation-state threat actor. This incident exposed critical F5 BIG-IP vulnerabilities and triggered heightened scrutiny across enterprise edge infrastructure.
This was not a typical vulnerability disclosure. The attackers exfiltrated a strategic critical pair of assets: portions of BIG-IP source code, and internal details of undisclosed (unpatched) vulnerabilities.
## CISA’s KEV Inclusion Underscores the S
Qualys
F5 BIG-IP Vulnerabilities: Strategic Breach Response with Qualys | Qualys
blogs_qualys·2025-10-18
F5 BIG-IP Vulnerabilities: Strategic Breach Response with Qualys | Qualys
#### Table of Contents
- CISAs KEV Inclusion Underscores the Severity of the F5 BIG-IP Breach
- The Risk-Velocity Mismatch: F5 Patching Decelerates as Attacker Insight Accelerates
- How Qualys Helps You Discover F5 Assets and Detect Related Vulnerabilities
- Conclusion
In mid-October 2025, the cybersecurity landscape was dealt a severe blow. F5 disclosed a long-term, sophisticated breach by a nation-state threat actor. This incident exposed critical F5 BIG-IP vulnerabilities and triggered heightened scrutiny across enterprise edge infrastructure.
This was not a typical vulnerability disclosure. The attackers exfiltrated a strategic critical pair of assets: portions of BIG-IP source code, and internal details of undisclosed (unpatched) vulnerabilities.
## CISA’s KEV Inclusion Underscore
Tenable
FAQ on F5 Security Incident
blogs_tenable·2025-10-15
FAQ on F5 Security Incident
## Cloud Exposure
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## Vulnerability Exposure
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## AI Exposure
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## OT/IoT Exposure
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## Identity Exposure
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## Business needs
Active Directory
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AWS security
Azure security
Cloud Security Posture Man
2025-10-15
Published