CVE-2021-43118 is a critical remote command injection vulnerability affecting DrayTek Vigor 2960, 3900, and 300B routers running firmware version 1.5.1.3. An unauthenticated attacker can exploit this flaw by sending a specially crafted HTTP request to mainfunction.cgi, leading to arbitrary code execution. With a CVSS score of 9.8, this vulnerability is highly severe, requiring no user interaction and allowing for complete compromise of confidentiality, integrity, and availability. While no public exploit code or active exploitation has been observed, its high EPSS score suggests a significant probability of future exploitation.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
1.5.1.3CPE matchmatch criteria | cpe:2.3:o:draytek:vigor2960_firmware:1.5.1.3:*:*:*:*:*:*:* | ||
1.5.1.3CPE matchmatch criteria | cpe:2.3:o:draytek:vigor3900_firmware:1.5.1.3:*:*:*:*:*:*:* | ||
1.5.1.3CPE matchmatch criteria | cpe:2.3:o:draytek:vigor300b_firmware:1.5.1.3:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.