CVE-2021-22976: F5 On BIG-IP Advanced WAF and ASM version 16.0.x before 16.0.1.1, 15.1.x before 15.1.2, 14.1.x before 14.1.3.1, 13.1.x before
This F5 advisory covers CVE-2021-22976. Related products: BIG-IP, Advanced WAF, ASM.
- CVE-2021-22976
Key facts
- Vendor rating
- High, CVSS 7.5
- CISA KEV
- Not listed (catalogue checked )
- Versions named
- 16.0.x; 15.1.x; 14.1.x and 1 more below
- Fixed in
- 16.0.1.1, 15.1.2, 14.1.3.1 and 1 more below
- Source published
- Source revised
- Listed by VulniPulse
- Record changed
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Related products & platforms
Description
On BIG-IP Advanced WAF and ASM version 16.0.x before 16.0.1.1, 15.1.x before 15.1.2, 14.1.x before 14.1.3.1, 13.1.x before 13.1.3.6, and all 12.1.x versions, when the BIG-IP ASM system processes WebSocket requests with JSON payloads, an unusually large number of parameters can cause excessive CPU usage in the BIG-IP ASM bd process.
Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.
Text from the source record.
- 16.0.x
- 15.1.x
- 14.1.x
- 13.1.x
Official advisory · high-confidence parse· fetched ·verify at source
How to fix CVE-2021-22976
Upgrade to a fixed release named by F5:
- 16.0.1.1
- 15.1.2
- 14.1.3.1
- 13.1.3.6
Support dates for the fixed release lines
- F5 BIG-IP 16.0: support ended
- F5 BIG-IP 15.1: support ended
- F5 BIG-IP 14.1: support ended
- F5 BIG-IP 13.1: support ended
More F5 advisories
CVE-2024-21849Feb 14, 2024When an Advanced WAF/ASM security policy and a Websockets profile are configuredCVE-2026-94127Sep 22, 2026When a BIG-IP APM access policy and an OAuth profile are configured on a virtual serverCVE-2026-66842Sep 2, 2026BIG-IP vulnerabilityCVE-2026-59762Jul 15, 2026BIG-IP: When an HTTP/2 profile is configured on a virtual server, undisclosed requestsCVE-2026-39458May 13, 2026When a BIG-IP is configured with DNS cachingCVE-2025-58071Oct 15, 2025When IPsec is configured on the BIG-IP system, undisclosed traffic
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