Is CVE-2021-27692 actively exploited?

Yes. CVE-2021-27692 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-27692 be exploited remotely?

The attack vector of CVE-2021-27692 has not been classified yet.

What is the CVSS score of CVE-2021-27692?

CVE-2021-27692 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-27692

UNKNOWNCISA KEVIN THE WILD

CVE-2021-27692

Published: April 11, 2026

EPSS:3.25%probability of exploitation in 30 daysPercentile:87.1th

Official Description

Command Injection in Tenda G1 and G3 routers with firmware versions v15.11.0.17(9502)_CN or v15.11.0.16(9024)_CN allows remote attackers to execute arbitrary OS commands via a crafted "action/umountUSBPartition" request. This occurs because the "formSetUSBPartitionUmount" function executes the "doSystemCmd" function with untrusted input.

NVD Source

Risk Analysis

Tenda G1 and G3 routers with specific firmware versions are vulnerable to command injection through a crafted "action/umountUSBPartition" request. This allows remote attackers to execute arbitrary operating system commands. Its inclusion in CISA's KEV catalog confirms active exploitation, making it a critical security concern for affected router users.

This vulnerability is actively exploited in the wild and is listed in CISA's Known Exploited Vulnerabilities catalog. The flaw is remotely exploitable by sending a crafted request to the router.

Recommended Action

Update Tenda G1 and G3 router firmware to a version that addresses the command injection vulnerability. Avoid exposing router administration interfaces to the public internet.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2021-27692 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2021-27692 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.