CVE-2021-27691 is a critical command injection vulnerability affecting Tenda G0, G1, and G3 routers running specific firmware versions. This flaw allows unauthenticated remote attackers to execute arbitrary operating system commands on the device by sending a specially crafted request to the "formSetDebugCfg" function, which improperly uses untrusted input with the system function. With a CVSS score of 9.8, this vulnerability presents a severe risk due to its network-based attack vector, low attack complexity, and complete compromise of confidentiality, integrity, and availability. While no active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion has been observed, the high FAUCET Risk Score of 84/100 indicates its potential for severe impact if exploited.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
15.11.0.5\(5876\)_cnCPE matchmatch criteria | cpe:2.3:o:tendacn:g0_firmware:15.11.0.5\(5876\)_cn:*:*:*:*:*:*:* | ||
15.11.0.6\(9039\)_cnCPE matchmatch criteria | cpe:2.3:o:tendacn:g0_firmware:15.11.0.6\(9039\)_cn:*:*:*:*:*:*:* | ||
15.11.0.16\(9024\)_cnCPE matchmatch criteria | cpe:2.3:o:tendacn:g1_firmware:15.11.0.16\(9024\)_cn:*:*:*:*:*:*:* | ||
15.11.0.17\(9502\)_cnCPE matchmatch criteria | cpe:2.3:o:tendacn:g1_firmware:15.11.0.17\(9502\)_cn:*:*:*:*:*:*:* | ||
15.11.0.16\(9024\)_cnCPE matchmatch criteria | cpe:2.3:o:tendacn:g3_firmware:15.11.0.16\(9024\)_cn:*:*:*:*:*:*:* |
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.