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  4. CVE 2026 121615 linksys e5600 login meshlogincgi improper
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Back to active CVEs
Critical · CVSS 10.0CVE-2026-121615

Linksys E5600 Login mesh_login.cgi improper authenticationCVE-2026-121615

Answer in brief

CVE-2026-121615 records a Critical severity (CVSS 10.0) vulnerability in Linksys E5600 Login mesh_login.cgi improper authentication. The current sources do not mark it as known exploited. The current feed maps Linksys/E5600 (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 4, 2026Updated Nov 4, 2026Source checked Nov 4, 2026First seen by HOL Nov 4, 2026Material review Nov 4, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 10.0
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 10.0. 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 Linksys/E5600 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linksys/E5600generic1.1.0.26Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linksys/E5600.
  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 4, 2026

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

  2. Source modified

    Nov 4, 2026

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

  3. First seen by HOL

    Nov 4, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencevuldb.com
  • Source referencevuldb.com
  • Source referencevuldb.com
  • Source referencevuldb.com
  • Source referencelinksys.com
Upstream source description

A vulnerability was determined in Linksys E5600 1.1.0.26. Affected is an unknown function of the file /cgi-bin/mesh_login.cgi of the component Login Handler. Executing a manipulation can lead to improper authentication. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way. This vulnerability only affects products that are no longer supported by the maintainer.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Linksys E5600 JSON Request mesh_login.cgi strcpy out-of-bounds writeSame linksys/e5600 package
  • Linksys E5600 Header upload_fw.cgi init_multipart out-of-bounds writeSame linksys/e5600 package
  • Linksys E5600 Factory Quality Control fqc.cgi information disclosureSame linksys/e5600 package

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-287
Source
CVE List V5
Source checked
Nov 4, 2026
References
6 linked sources
Open source record