HOMEVULNERABILITIESCVE-2023-35721
HIGH

CVE-2023-35721

CWE-295Published: May 3, 2024· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2023-35721 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorAdjacent
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

netgear2 product(s)
rax50 firmwarerax50
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

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

All References (4)

→
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

Quick Facts

CVE IDCVE-2023-35721
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-295
CISA KEVNo
Affected1 vendor(s)
PublishedMay 3, 2024

Related CVEs (CWE-295)

CVE-2026-4370
10.0
CVE-2010-4533
9.8
CVE-2019-1010275
9.8
CVE-2018-21029
9.8
CVE-2019-18633
9.8
CVE-2019-18632
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-35721 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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