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CVE-2021-42911

CRITICAL CVSS: 9.8 Published: 2022-03-29 Modified: 2026-06-17

Description

A Format String vulnerability exists in DrayTek Vigor 2960 <= 1.5.1.3, DrayTek Vigor 3900 <= 1.5.1.3, and DrayTek Vigor 300B <= 1.5.1.3 in the mainfunction.cgi file via a crafted HTTP message containing malformed QUERY STRING, which could let a remote malicious user execute arbitrary code.

Affected Platforms

Draytek Vigor2960 FirmwareDraytek Vigor300BDraytek Vigor3900 FirmwareDraytek Vigor3900Draytek Vigor2960Draytek Vigor300B Firmware

Weakness Type

CWE-134

References