CVE-2021-25310

Name: CVE-2021-25310
Creator: NVD / NIST
Published: 2021-02-02T15:15:16.84+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 4.63%

Last modified Jun 17, 2026

CVE-2021-25310 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. The administration web interface on Belkin Linksys WRT160NL 1.0.04.002_US_20130619 devices allows remote authenticated attackers to execute system commands with root privileges via shell metacharacters in the ui_language POST parameter to the apply.cgi form endpoint. This occurs in do_upgrade_post in mini_httpd. EPSS estimates a 4.63% chance of exploitation in the next 30 days.

Description

The administration web interface on Belkin Linksys WRT160NL 1.0.04.002_US_20130619 devices allows remote authenticated attackers to execute system commands with root privileges via shell metacharacters in the ui_language POST parameter to the apply.cgi form endpoint. This occurs in do_upgrade_post in mini_httpd. NOTE: This vulnerability only affects products that are no longer supported by the maintaine

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

4.63%

90.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Belkin	Linksys Wrt160nl Firmware	1.0.04.002_us_20130619

References

https://research.nccgroup.com/2021/01/28/technical-advisory-linksys-wrt160nl-authenticated-command-injection-cve-2021-25310/Exploit, Third Party Advisory
https://research.nccgroup.com/?research=Technical%20advisoriesThird Party Advisory
https://research.nccgroup.com/2021/01/28/technical-advisory-linksys-wrt160nl-authenticated-command-injection-cve-2021-25310/Exploit, Third Party Advisory
https://research.nccgroup.com/?research=Technical%20advisoriesThird Party Advisory

Timeline

Published: Feb 2, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-25310?

How severe is CVE-2021-25310?

CVE-2021-25310 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 4.63% probability of exploitation in the next 30 days.

How do I fix CVE-2021-25310?

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-2021-25310?

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

Scan your code now

Source: NVD / NIST