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No exploitation reportedFix available

CVE-2021-22992

No exploitation reported by the sources we read.

  • Published2021-03-31
  • Fixed in16.0.1.1 · 15.1.2.1 · 14.1.4 · 13.1.3.6 · 12.1.5.3 · 11.6.5.3
  • WeaknessCWE-120

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, 12.1.x before 12.1.5.3, and 11.6.x before 11.6.5.3, a malicious HTTP response to an Advanced WAF/BIG-IP ASM virtual server with Login Page configured in its policy may trigger a buffer overflow, resulting in a DoS attack. In certain situations, it may allow remote code execution (RCE), leading to complete system compromise. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.

Timeline

dates in UTC
  1. 2021-03-3117:15CVE publishedNVD
  2. 2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-22992?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-22992?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
F5 big-ip access policy manager
BranchAffectedFixed in
16.0≥ 16.0.0, < 16.0.1.116.0.1.1
15.1≥ 15.1.0, < 15.1.2.115.1.2.1
14.1≥ 14.1.0, < 14.1.414.1.4
13.1≥ 13.1.0, < 13.1.3.613.1.3.6
12.1≥ 12.1.0, < 12.1.5.312.1.5.3
11.6≥ 11.6.1, < 11.6.5.311.6.5.3
F5 big-ip advanced firewall manager
BranchAffectedFixed in
16.0≥ 16.0.0, < 16.0.1.116.0.1.1
15.1≥ 15.1.0, < 15.1.2.115.1.2.1
14.1≥ 14.1.0, < 14.1.414.1.4
13.1≥ 13.1.0, < 13.1.3.613.1.3.6
12.1≥ 12.1.0, < 12.1.5.312.1.5.3
11.6≥ 11.6.1, < 11.6.5.311.6.5.3
F5 big-ip advanced web application firewall
BranchAffectedFixed in
16.0≥ 16.0.0, < 16.0.1.116.0.1.1
15.1≥ 15.1.0, < 15.1.2.115.1.2.1
14.1≥ 14.1.0, < 14.1.414.1.4
13.1≥ 13.1.0, < 13.1.3.613.1.3.6
12.1≥ 12.1.0, < 12.1.5.312.1.5.3
11.6≥ 11.6.1, < 11.6.5.311.6.5.3

11 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update F5 big-ip access policy manager to 16.0.1.1 · 15.1.2.1 · 14.1.4 · 13.1.3.6 · 12.1.5.3 · 11.6.5.3

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVSS 3.19.8read 2026-10-23
  • NVDCVSS 2.09.3read 2026-10-23
  • NVDweakness (CWE)CWE-120read 2026-10-23
  • FIRST EPSSEPSS score67.6 %read 2026-10-23

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2021-03-31
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2021-22992?

On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, 12.1.x before 12.1.5.3, and 11.6.x before 11.6.5.3, a malicious HTTP response to an Advanced WAF/BIG-IP ASM virtual server with Login Page configured in its policy may trigger a buffer overflow, resulting in a DoS attack. In certain situations, it may allow remote code execution (RCE), leading to complete system compromise. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.

Is CVE-2021-22992 actively exploited?

Active exploitation of CVE-2021-22992 has not been confirmed. Its EPSS score was 67.6% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-22992?

CVE-2021-22992 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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