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Back to active CVEs
Critical ยท CVSS 9.8CVE-2026-74233

Zbtlink MQWrt infosrvd Command InjectionCVE-2026-74233

Answer in brief

CVE-2026-74233 records a Critical severity (CVSS 9.8) vulnerability in Zbtlink MQWrt infosrvd Command Injection. The current sources do not mark it as known exploited. The current feed maps Unknown/CTN720-W1 (generic), Unknown/LF-1541 (generic), Unknown/MT7620N (generic), Zbtlink/WE1326 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Analysis pending evidence review

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

Published Aug 27, 2026Updated Sep 24, 2026Source checked Oct 12, 2026First seen by HOL Aug 27, 2026Material review Sep 24, 2026
Upstream Advisory

Key facts

Risk
Critical ยท CVSS 9.8
Exploitation
Not marked as known exploited
Affected software
16 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 9.8. 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 Unknown/CTN720-W1 (generic), Unknown/LF-1541 (generic), Unknown/MT7620N (generic), Zbtlink/WE1326 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Unknown/CTN720-W1generic19.1101Not reported
Unknown/LF-1541generic19.1101Not reported
Unknown/MT7620Ngeneric19.1101Not reported
Zbtlink/WE1326generic19.1101Not reported
Zbtlink/WE2426-Cgeneric19.1112Not reported
Zbtlink/WE357generic19.1101Not reported
Zbtlink/WE5926generic19.1101Not reported
Zbtlink/WE5926-EC_QPgeneric20.0516Not reported
Zbtlink/WE5926-WDgeneric19.1101Not reported
Zbtlink/WE826-Qgeneric19.1101Not reported
Zbtlink/WE826-T2generic19.1101Not reported
Zbtlink/WE826-WDgeneric19.1101Not reported
Zbtlink/WF3526-Pgeneric19.051Not reported
Zbtlink/WG108generic19.1101Not reported
Zbtlink/WG3526generic19.1101Not reported
Unknown/WRC1generic20.0622Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Unknown/CTN720-W1, Unknown/LF-1541, Unknown/MT7620N.
  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

    Aug 27, 2026

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

  2. Source modified

    Sep 24, 2026

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

  3. First seen by HOL

    Aug 27, 2026

Sources and claim methodology

  • Source referencevulncheck.com
  • Source referencevulncheck.com
Upstream source description

Zbtlink WE1326, WE357, WE5926, WE5926-WD, WE826-Q, WE826-T2, WE826-WD, WG108, and WG3526 firmware 19.1101, Zbtlink WE2426-C firmware 19.1112, Zbtlink WE5926-EC_QP firmware 20.0516, Zbtlink WF3526-P firmware 19.051, CTN720-W1, LF-1541, and MT7620N firmware 19.1101, and WRC1 firmware 20.0622 contain an unauthenticated command injection in the infosrvd service (UDP/9992). A remote unauthenticated attacker can send a crafted UDP packet to execute arbitrary commands as root. The service's authentication uses a hardcoded salt and an all-zero wildcard MAC bypass, rendering it ineffective.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • ZKTeco BioTime hard-coded keyAlso CWE-321
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  • Channel tokens and organization API key exposed in API responsesSame generic ecosystem
  • zhayujie CowAgent Streaming Tool-Call Argument json.loads allocation of resourcesSame generic ecosystem
  • zhayujie CowAgent Markdown Rendering Markdown.tsx denial of serviceSame generic ecosystem
  • Appwrite Browser Screenshot Service Get.php PublicHostname server-side request forgerySame generic ecosystem

Record context

Vulnerability class
Command Injection
EPSS
Not reported
CWE IDs
CWE-321, CWE-78
Source
CVE List V5
Source checked
Oct 12, 2026
References
2 linked sources
Open source record