CVE-2021-42911

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 93%
VendorProductVersion
draytekvigor2960_firmware
𝑥
≤ 1.5.1.3
draytekvigor3900_firmware
𝑥
≤ 1.5.1.3
draytekvigor300b_firmware
𝑥
≤ 1.5.1.3
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://gist.github.com/Cossack9989/e9c1c2d2e69b773ca4251acdd77f2835
https://gist.github.com/Cossack9989/e9c1c2d2e69b773ca4251acdd77f2835