Critical severity · published Mar 29, 2022
CVE-2021-43118
A Remote Command Injection 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 via a crafted HTTP message containing…
9.8
CVSS
34.8%
EPSS
No
On KEV
Description
A Remote Command Injection 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 via a crafted HTTP message containing malformed QUERY STRING in mainfunction.cgi, which could let a remote malicious user execute arbitrary code.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)34.8% · higher than 98% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VF
Vigor2960 Firmware · Draytek
1.5.1.3 · source: NVD
VF
Vigor300b Firmware · Draytek
1.5.1.3 · source: NVD
VF
Vigor3900 Firmware · Draytek
1.5.1.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-43118
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-43118
Exploit
https://gist.github.com/Cossack9989/6034c077f46e4f06d0992e9f2fae7f26
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