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No exploitation reported

CVE-2026-129258

Tenda AC18 Firmware Upgrade upgrade data authenticity

No exploitation reported by the sources we read.

  • Published2026-11-14
  • WeaknessCWE-345

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 was identified in Tenda AC18 15.03.05.05_multi/15.03.05.19 Build 6318. Affected by this vulnerability is an unknown functionality of the file /cgi-bin/upgrade of the component Firmware Upgrade Handler. Such manipulation of the argument upgradeFile leads to insufficient verification of data authenticity. The attack may be launched remotely. The exploit is publicly available and might be used.

Timeline

dates in UTC
  1. 2026-11-1414:30CVE publishedCNA

Versions per branch

Products declared by the CNA

As VulDB, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.

  • Tenda AC18
    Affected
    • = 15.03.05.05_multino fix stated
    • = 15.03.05.19 Build 6318no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-14

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-129258 yet.

Full record on NVD

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
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 4.09.42026-11-14
  • CNACVSS 3.19.12026-11-14
  • NVDCVSS 3.19.1read 2026-11-14
  • CNACVSS 3.09.12026-11-14
  • CNACVSS 2.08.32026-11-14
  • CNAweakness (CWE)CWE-3452026-11-14
  • NVDweakness (CWE)CWE-345read 2026-11-14

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS 4.0 vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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
2026-11-14
Last Modified
2026-11-14
NVD status
Deferred

Frequently asked questions

What is CVE-2026-129258?

A vulnerability was identified in Tenda AC18 15.03.05.05_multi/15.03.05.19 Build 6318. Affected by this vulnerability is an unknown functionality of the file /cgi-bin/upgrade of the component Firmware Upgrade Handler. Such manipulation of the argument upgradeFile leads to insufficient verification of data authenticity. The attack may be launched remotely. The exploit is publicly available and might be used.

Is CVE-2026-129258 actively exploited?

Active exploitation of CVE-2026-129258 has not been confirmed.

What is the CVSS score for CVE-2026-129258?

CVE-2026-129258 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.

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