CVE-2026-71941: high-severity vulnerability in DrayTek Corporation VigorSwitch FX2120
DrayTek VigorSwitch Multiple Models Buffer Overflow via diag_logmail
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.6epss 0.7%
Multiple DrayTek VigorSwitch models contain a buffer overflow vulnerability in the diag_logmail function. The vulnerability is caused by concatenating multiple smtpReceiver email addresses into a fixed-size buffer without checking the remaining buffer size. A remote attacker can trigger this vulnerability via crafted input, causing a denial of service or potentially executing arbitrary commands. Exploitation requires valid administrative credentials for the device's web management interface.
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
DrayTek Corporation · VigorSwitch FX2120DrayTek Corporation · VigorSwitch G1280DrayTek Corporation · VigorSwitch G1282DrayTek Corporation · VigorSwitch G2100DrayTek Corporation · VigorSwitch G2121DrayTek Corporation · VigorSwitch G2280xDrayTek Corporation · VigorSwitch G2282xDrayTek Corporation · VigorSwitch G2540xDrayTek Corporation · VigorSwitch G2540xsDrayTek Corporation · VigorSwitch G2542xDrayTek Corporation · VigorSwitch P1280DrayTek Corporation · VigorSwitch P1281xDrayTek Corporation · VigorSwitch P1282DrayTek Corporation · VigorSwitch P2100DrayTek Corporation · VigorSwitch P2121DrayTek Corporation · VigorSwitch P2280xDrayTek Corporation · VigorSwitch P2282xDrayTek Corporation · VigorSwitch P2540xDrayTek Corporation · VigorSwitch P2540xsDrayTek Corporation · VigorSwitch P2542xDrayTek Corporation · VigorSwitch P2542xhDrayTek Corporation · VigorSwitch PQ2121xDrayTek Corporation · VigorSwitch PQ2200xbDrayTek Corporation · VigorSwitch PQ2300xbDrayTek Corporation · VigorSwitch PX2060DrayTek Corporation · VigorSwitch Q2121xDrayTek Corporation · VigorSwitch Q2200xDrayTek Corporation · VigorSwitch Q2300xRelated CVEs — DrayTek Corporation VigorSwitch FX2120
In the same product, most dangerous first.
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