CVE-2021-42911
CVSS v3
9.8
CRITICAL
EPSS Score
3.9 %
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2022-03-29
Frequently asked questions
What is 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.
Is CVE-2021-42911 actively exploited?
Active exploitation of CVE-2021-42911 has not been confirmed. The EPSS score is 3.9%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-42911?
CVE-2021-42911 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2021-42911 affecting your environment?
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