CVE-2021-27273

Name: CVE-2021-27273
Creator: NVD / NIST
Published: 2021-03-29T21:15:13.093+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 65.00%

Last modified Jun 17, 2026

CVE-2021-27273 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. This vulnerability allows remote attackers to execute arbitrary code on affected installations of NETGEAR ProSAFE Network Management System 1.6.0.26. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. EPSS estimates a 65.00% chance of exploitation in the next 30 days.

Description

This vulnerability allows remote attackers to execute arbitrary code on affected installations of NETGEAR ProSAFE Network Management System 1.6.0.26. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the SettingConfigController class. When parsing the fileName parameter, the process does not properly validate a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of SYSTEM. Was ZDI-CAN-12121.

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

65.00%

99.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-78

Affected Software

Vendor	Product	Versions
Netgear	Prosafe Network Management System	1.6.0.26

References

https://kb.netgear.com/000062686/Security-Advisory-for-Post-Authentication-Command-Injection-on-NMS300-PSV-2020-0559Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-356/Third Party Advisory, VDB Entry
https://kb.netgear.com/000062686/Security-Advisory-for-Post-Authentication-Command-Injection-on-NMS300-PSV-2020-0559Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-356/Third Party Advisory, VDB Entry

Timeline

Published: Mar 29, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27273?

How severe is CVE-2021-27273?

CVE-2021-27273 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 65.00% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27273?

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-2021-27273?

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

Scan your code now

Source: NVD / NIST