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CRITICAL · 9.8

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 malformed QUERY STRING i...

Vulnerability 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 Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
DraytekVigor2960 Firmware1.5.1.3
DraytekVigor2960-
DraytekVigor3900 Firmware1.5.1.3
DraytekVigor3900-
DraytekVigor300B Firmware1.5.1.3
DraytekVigor300B-

Related Weaknesses (CWE)

CWE-77

References

FAQ

What is CVE-2021-43118?

CVE-2021-43118 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 i...

How severe is CVE-2021-43118?

CVE-2021-43118 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2021-43118?

Check the references section above for vendor advisories and patch information. Affected products include: Draytek Vigor2960 Firmware, Draytek Vigor2960, Draytek Vigor3900 Firmware, Draytek Vigor3900, Draytek Vigor300B Firmware.