CVE-2021-27691

CRITICALCVSS 9.8/10EPSS 25.18%

Last modified

CVE-2021-27691 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Command Injection in Tenda G0 routers with firmware versions v15.11.0.6(9039)_CN and v15.11.0.5(5876)_CN , and 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/setDebugCfg request. This occurs because the "formSetDebugCfg" function executes glibc's system function with untrusted input.. EPSS estimates a 25.18% chance of exploitation in the next 30 days.

Description

Command Injection in Tenda G0 routers with firmware versions v15.11.0.6(9039)_CN and v15.11.0.5(5876)_CN , and 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/setDebugCfg request. This occurs because the "formSetDebugCfg" function executes glibc's system function with untrusted input.

Metrics

CVSS 3.1
9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
25.18%

97.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
TendacnG0 Firmware15.11.0.5\(5876\)_cn
TendacnG0 Firmware15.11.0.6\(9039\)_cn
TendacnG1 Firmware15.11.0.16\(9024\)_cn
TendacnG1 Firmware15.11.0.17\(9502\)_cn
TendacnG3 Firmware15.11.0.16\(9024\)_cn
TendacnG3 Firmware15.11.0.17\(9502\)_cn

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-27691?
Command Injection in Tenda G0 routers with firmware versions v15.11.0.6(9039)_CN and v15.11.0.5(5876)_CN , and 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/setDebugCfg request. This occurs because the "formSetDebugCfg" function executes glibc's system function with untrusted input.
How severe is CVE-2021-27691?
CVE-2021-27691 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 25.18% probability of exploitation in the next 30 days.
How do I fix CVE-2021-27691?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27691?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST