How severe is CVE-2023-35721?

CVE-2023-35721 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-35721 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-35721?

CVE-2023-35721 affects Netgear Rax50 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-35721?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2023-35721 have an EU (EUVD) identifier?

Yes. CVE-2023-35721 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-39720.

When was CVE-2023-35721 published?

CVE-2023-35721 was published on 2024-05-03 and last updated on 2026-06-17.

CVE-2023-35721

CVE-2023-35721 is a high-severity vulnerability in Netgear Rax50 Firmware with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-295.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-39720
Weakness: CWE-295
Affected product: Netgear Rax50 Firmware
Published: 2024-05-03
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-35721?: 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.
How severe is CVE-2023-35721?: CVE-2023-35721 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-35721 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-35721?: CVE-2023-35721 affects Netgear Rax50 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-35721?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2023-35721 have an EU (EUVD) identifier?: Yes. CVE-2023-35721 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-39720.
When was CVE-2023-35721 published?: CVE-2023-35721 was published on 2024-05-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:netgear:rax50_firmware:*:*:*:*:*:*:*:*

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