Is CVE-2024-5699 actively exploited?

No active exploitation of CVE-2024-5699 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2024-5699 be exploited remotely?

Yes. CVE-2024-5699 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2024-5699?

CVE-2024-5699 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2024-5699

CRITICAL

CVE-2024-5699

CWE-178Published: June 11, 2024· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

In violation of spec, cookie prefixes such as `__Secure` were being ignored if they were not correctly capitalized - by spec they should be checked with a case-insensitive comparison. This could have resulted in the browser not correctly honoring the behaviors specified by the prefix. This vulnerability affects Firefox < 127.

NVD Source

Technical Analysis

CVE-2024-5699 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

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 9.8.