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Vulnerabilities

Vulnerability · CVE-2026-42058

An authenticated attacker's undisclosed requests to BIG-IP iControl REST can lead to an information leak of BIG-IP local user account names.

Published May 13, 2026 · catalog updated Jun 23, 2026 · big-ip access policy manager

Check if you run it

No confirmed exploitation is on record for CVE-2026-42058. EPSS is 0.26%. Act only if a listed version of big-ip access policy manager is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.26%
Remediation
Not established
Affected products
cpe f5/big-ip access policy manager · cpe f5/big-ip advanced firewall manager · cpe f5/big-ip advanced web application firewall · cpe f5/big-ip analytics

An authenticated attacker's undisclosed requests to BIG-IP iControl REST can lead to an information leak of BIG-IP local user account names. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe f5/big-ip access policy manager21.0.0
  • cpe f5/big-ip advanced firewall managerversion unspecified
  • cpe f5/big-ip advanced web application firewallversion unspecified
  • cpe f5/big-ip analyticsversion unspecified

How to fix CVE-2026-42058

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-42058. EPSS is 0.26%. Act only if a listed version of big-ip access policy manager is installed.

Which versions are affected?

Compare what you have installed with f5/big-ip access policy manager 21.0.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-732: Incorrect Permission Assignment for Critical Resource. EPSS 0.26%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. May 13, 2026 · NIST NVD

    Detected

    An authenticated attacker's undisclosed requests to BIG-IP iControl REST can lead to an information leak of BIG-IP local user account names. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

  2. Jun 23, 2026 · NIST NVD

    Updated

    An authenticated attacker's undisclosed requests to BIG-IP iControl REST can lead to an information leak of BIG-IP local user account names. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Sources

  • CVE.orgVulnerability recordCVE-2026-42058

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-42058

    30-day exploitation probability 0.3%

    first.org
  • NIST NVDVulnerability recordCVE-2026-42058

    An authenticated attacker's undisclosed requests to BIG-IP iControl REST can lead to an information leak of BIG-IP local user account names. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.