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Public proof of concept

CVE-2025-13446

A public proof of concept exists; no exploitation attested.

  • Published2025-11-20
  • WeaknessCWE-119 · CWE-121

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

A vulnerability has been found in Tenda AC21 16.03.08.16. This vulnerability affects unknown code of the file /goform/SetSysTimeCfg. The manipulation of the argument timeZone/time leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used.

Timeline

dates in UTC
  1. 2025-11-2015:17CVE publishedNVD

Versions per branch

NVD
Tenda ac21 firmwareversion to verify
BranchAffectedFixed in
16.3= 16.03.08.16no fix published

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

Products declared by the CNA1 product

As VulDB, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Tenda AC21
    Affected
    • = 16.03.08.16no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-02-24

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionpoc2025-11-20
  • CNACVSS 4.07.4known since 2026-10-23
  • CNACVSS 3.18.8known since 2026-10-23
  • NVDCVSS 3.19.8read 2026-10-23
  • CNACVSS 2.09known since 2026-10-23
  • CNAweakness (CWE)CWE-119, CWE-121known since 2026-10-23
  • FIRST EPSSEPSS score4.2 %2026-11-08
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 4.0 vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
2025-11-20
Last Modified
2026-10-18
NVD status
Analyzed
GitHub Advisory
GHSA-8xxq-7578-r2ww

Frequently asked questions

What is CVE-2025-13446?

A vulnerability has been found in Tenda AC21 16.03.08.16. This vulnerability affects unknown code of the file /goform/SetSysTimeCfg. The manipulation of the argument timeZone/time leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used.

Is CVE-2025-13446 actively exploited?

A proof-of-concept exploit exists for CVE-2025-13446, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2025-13446?

CVE-2025-13446 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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