How severe is CVE-2023-29476?

CVE-2023-29476 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2023-29476 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2023-29476?

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

Does CVE-2023-29476 have an EU (EUVD) identifier?

Yes. CVE-2023-29476 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-33044.

When was CVE-2023-29476 published?

CVE-2023-29476 was published on 2024-12-14 and last updated on 2026-06-17.

CVE-2023-29476

CVE-2023-29476 is a critical-severity vulnerability with a CVSS 3.x base score of 9.1. 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-444.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-33044
Weakness: CWE-444
Published: 2024-12-14
Last modified: 2026-06-17

Description

In Menlo On-Premise Appliance before 2.88, web policy may not be consistently applied properly to intentionally malformed client requests. This is fixed in 2.88.2+, 2.89.1+, and 2.90.1+.

Frequently asked questions

What is CVE-2023-29476?: In Menlo On-Premise Appliance before 2.88, web policy may not be consistently applied properly to intentionally malformed client requests. This is fixed in 2.88.2+, 2.89.1+, and 2.90.1+.
How severe is CVE-2023-29476?: CVE-2023-29476 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2023-29476 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2023-29476?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2023-29476 have an EU (EUVD) identifier?: Yes. CVE-2023-29476 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-33044.
When was CVE-2023-29476 published?: CVE-2023-29476 was published on 2024-12-14 and last updated on 2026-06-17.

References

https://www.menlosecurity.com/published-security-vulnerabilities

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