CRITICAL 9.3 NVD

CVE-2026-74233

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_

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.

References

Published: 2026-08-27 · Source: NVD · Feed updated: 2026-08-27

This critical severity vulnerability with a CVSS score of 9.3 was published on 2026-08-27 via NVD.

Risk Timeline

CVE Disclosed2026-08-27 · -1 days ago

Remediation Resources

Official Advisory

vulncheck.com/blog/zbt-darklantern-speakingstone

Official Advisory

www.vulncheck.com/advisories/zbtlink-mqwrt-infosrvd-command-injection

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