JSON Schema Vulnerability in F5 Networks BIG-IP Advanced WAF and ASM
CVE-2025-54858

8.7HIGH

Key Information:

Vendor

F5
Status
Big-ip
Vendor
CVE Published:
15 October 2025

What is CVE-2025-54858?

This vulnerability occurs when F5 Networks' BIG-IP Advanced WAF or ASM is configured with a JSON content profile containing a malformed JSON schema. When the security policy utilizing this profile is applied to a virtual server, it can lead to unintended terminations of the bd process upon receipt of certain undisclosed requests, potentially disrupting service availability.

Affected Version(s)

BIG-IP 17.5.0 < 17.5.1.3

BIG-IP 17.1.0 < 17.1.3

BIG-IP 16.1.0 < 16.1.6.1

References

https://my.f5.com/manage/s/article/K000156621
vendor-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

F5
JSON
.