No exploitation reportedFix available

CVE-2020-5926

Q: Is CVE-2020-5926 actively exploited?

Active exploitation of CVE-2020-5926 has not been confirmed. Its EPSS score was 1.0% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2020-5926?

CVE-2020-5926 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

No exploitation reported by the sources we read.

Published2020-08-26
Fixed in15.1.0.5 · 15.0.1.4 · 14.1.2.7
WeaknessCWE-404

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

In BIG-IP versions 15.1.0-15.1.0.4, 15.0.0-15.0.1.3, and 14.1.0-14.1.2.6, a BIG-IP virtual server with a Session Initiation Protocol (SIP) ALG profile, parsing SIP messages that contain a multi-part MIME payload with certain boundary strings can cause TMM to free memory to the wrong cache.

Timeline

dates in UTC

2020-08-2616:15CVE publishedNVD

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-2020-5926?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-5926?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

Branch	Affected	Fixed in	Source
15.1	≥ 15.1.0, < 15.1.0.5	15.1.0.5	NVD
15.0	≥ 15.0.0, < 15.0.1.4	15.0.1.4	NVD
14.1	≥ 14.1.0, < 14.1.2.7	14.1.2.7	NVD

F5 big-ip advanced firewall manager

Branch	Affected	Fixed in	Source
15.1	≥ 15.1.0, < 15.1.0.5	15.1.0.5	NVD
15.0	≥ 15.0.0, < 15.0.1.4	15.0.1.4	NVD
14.1	≥ 14.1.0, < 14.1.2.7	14.1.2.7	NVD

F5 big-ip analytics

Branch	Affected	Fixed in	Source
15.1	≥ 15.1.0, < 15.1.0.5	15.1.0.5	NVD
15.0	≥ 15.0.0, < 15.0.1.4	15.0.1.4	NVD
14.1	≥ 14.1.0, < 14.1.2.7	14.1.2.7	NVD

8 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

Update F5 big-ip access policy manager to 15.1.0.5 · 15.0.1.4 · 14.1.2.7

Advisories and patches

support.f5.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.17.5read 2026-10-23
NVDCVSS 2.05read 2026-10-23
NVDweakness (CWE)CWE-404read 2026-10-23
FIRST EPSSEPSS score1.0 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2020-08-26
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2020-5926?

Is CVE-2020-5926 actively exploited?

Active exploitation of CVE-2020-5926 has not been confirmed. Its EPSS score was 1.0% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-5926?

CVE-2020-5926 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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