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Vulnerabilities

Vulnerability · CVE-2025-52221

Tenda AC6 15.03.05.16_multi is vulnerable to Buffer Overflow in the formSetCfm function via the funcname, funcpara1, and funcpara2 parameters.

Published Apr 8, 2026 · catalog updated Jul 25, 2026 · ac6 firmware

Check if you run it

No confirmed exploitation is on record for CVE-2025-52221. EPSS is 0.39%. Act only if a listed version of ac6 firmware is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.39%
Remediation
Advisory link
Affected products
cpe tenda/ac6 firmware

Tenda AC6 15.03.05.16_multi is vulnerable to Buffer Overflow in the formSetCfm function via the funcname, funcpara1, and funcpara2 parameters.

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 tenda/ac6 firmware15.03.05.16_multi

How to fix CVE-2025-52221

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-2025-52221. EPSS is 0.39%. Act only if a listed version of ac6 firmware is installed.

Which versions are affected?

Compare what you have installed with tenda/ac6 firmware 15.03.05.16_multi. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-120: Classic Buffer Overflow; CWE-787: Out-of-bounds Write. EPSS 0.39%. 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.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 8, 2026 · NIST NVD

    Detected

    Tenda AC6 15.03.05.16_multi is vulnerable to Buffer Overflow in the formSetCfm function via the funcname, funcpara1, and funcpara2 parameters.

  2. Jul 25, 2026 · NIST NVD

    Updated

    Tenda AC6 15.03.05.16_multi is vulnerable to Buffer Overflow in the formSetCfm function via the funcname, funcpara1, and funcpara2 parameters.

Sources

  • CVE.orgVulnerability recordCVE-2025-52221

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-52221

    30-day exploitation probability 0.4%

    first.org
  • NIST NVDVulnerability recordCVE-2025-52221

    Tenda AC6 15.03.05.16_multi is vulnerable to Buffer Overflow in the formSetCfm function via the funcname, funcpara1, and funcpara2 parameters.

    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.