CVE-2023-35721

Name: CVE-2023-35721
Creator: NVD / NIST
Published: 2024-05-03T02:15:34.8+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.81%

Last modified Jun 17, 2026

CVE-2023-35721 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. NETGEAR Multiple Routers curl_post Improper Certificate Validation Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to compromise the integrity of downloaded information on affected installations of multiple NETGEAR routers. EPSS estimates a 0.81% chance of exploitation in the next 30 days.

Description

NETGEAR Multiple Routers curl_post Improper Certificate Validation Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to compromise the integrity of downloaded information on affected installations of multiple NETGEAR routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the update functionality, which operates over HTTPS. The issue results from the lack of proper validation of the certificate presented by the server. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of root. Was ZDI-CAN-19981.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

0.81%

52.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-295

Affected Software

Vendor	Product	Versions
Netgear	Rax50 Firmware	< 1.0.15.128

References

https://kb.netgear.com/000065668/Security-Advisory-for-Improper-Remote-Server-Certificate-Validation-on-the-RAX50-PSV-2023-0019Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-23-893/Third Party Advisory
https://kb.netgear.com/000065668/Security-Advisory-for-Improper-Remote-Server-Certificate-Validation-on-the-RAX50-PSV-2023-0019Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-23-893/Third Party Advisory

Timeline

Published: May 3, 2024
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-35721?

How severe is CVE-2023-35721?

CVE-2023-35721 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.81% probability of exploitation in the next 30 days.

How do I fix CVE-2023-35721?

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-2023-35721?

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

Scan your code now

Source: NVD / NIST