Cyber Resilience

CVE-2021-43118

CriticalPublic PoCRCE

Published: 29 March 2022

Published
29 March 2022
Modified
21 November 2024
KEV Added
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Patch
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CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.3208 96.9th percentile
Risk Priority 39 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-43118 is a critical-severity Command Injection (CWE-77) vulnerability in Draytek Vigor2960 Firmware. Its CVSS base score is 9.8 (Critical).

Operationally, ranked in the top 3.1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

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…

more

code.

CWE(s)
CWE-77

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

draytek
vigor2960 firmware
1.5.1.3
draytek
vigor3900 firmware
1.5.1.3
draytek
vigor300b firmware
1.5.1.3

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References