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VulnerabilityPublished

CVE-2026-41954: F5 BIG-IP · Information Exposure

Affects F5 BIG-IPSource CVE Database V5

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Not known to be exploited · CVSS 4.9 Medium · fixed in 21.0.0.1 : update F5 BIG-IP when convenient.

Data as of 29 Oct 2026, 19:04 UTC

CVSS 3.1 base score
4.9Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 22% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 21.0.0.1, 17.5.1.4, 17.1.3.1 +1
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 13 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade BIG-IP to 21.0.0.1, 17.5.1.4 or 17.1.3.1; BIG-IQ to 8.4.1.

Affected software

ProductAffectedFixed in
F5BIG-IPAffected
  • >=21.0.0 <21.0.0.1
  • >=17.5.0 <17.5.1.4
  • >=17.1.0 <17.1.3.1
  • >=16.1.0
Fixed in
  • 21.0.0.1
  • 17.5.1.4
  • 17.1.3.1
F5BIG-IQAffected
  • >=8.4.0 <8.4.1
Fixed in
  • 8.4.1

AI-suggested

Restrict resource administrator role assignments to trusted personnel only and review access controls to limit exposure. No additional vendor-recommended mitigations are available at this time.

Description

Sensitive information disclosure vulnerability exists in the undisclosed iControl REST endpoint and TMOS Shell (tmsh) command which may allow an authenticated attacker with resource administrator role privileges to view sensitive information. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

References

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