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  4. CVE 2026 129258 tenda ac18 firmware upgrade upgrade data
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Back to active CVEs
Critical · CVSS 9.4CVE-2026-129258

Tenda AC18 Firmware Upgrade upgrade data authenticityCVE-2026-129258

Answer in brief

CVE-2026-129258 records a Critical severity (CVSS 9.4) vulnerability in Tenda AC18 Firmware Upgrade upgrade data authenticity. The current sources do not mark it as known exploited. The current feed maps Tenda/AC18 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 14, 2026Updated Nov 14, 2026Source checked Nov 14, 2026First seen by HOL Nov 14, 2026Material review Nov 14, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.4
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 9.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Tenda/AC18 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Tenda/AC18generic15.03.05.05_multi || 15.03.05.19 Build 6318Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Tenda/AC18.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Nov 14, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 14, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 14, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencevuldb.com
  • Source referencevuldb.com
  • Source referencevuldb.com
  • Source referencevuldb.com
  • Source referencetenda.com.cn
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-345
Source
CVE List V5
Source checked
Nov 14, 2026
References
6 linked sources
Open source record