CVE-2021-42911
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Draytek Vigor2960 Firmware
PublishedMar 29, 2022
First seenMar 29, 2022
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| draytek vigor2960_firmware | v ≤ 1.5.1.3 | — |
| draytek vigor3900_firmware | v ≤ 1.5.1.3 | — |
| draytek vigor300b_firmware | v ≤ 1.5.1.3 | — |
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