Is CVE-2025-55031 actively exploited?

No active exploitation of CVE-2025-55031 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-55031 be exploited remotely?

Yes. CVE-2025-55031 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-55031?

CVE-2025-55031 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2025-55031

CRITICAL

CVE-2025-55031

CWE-601Published: August 19, 2025· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Malicious pages could use Firefox for iOS to pass FIDO: links to the OS and trigger the hybrid passkey transport. An attacker within Bluetooth range could have used this to trick the user into using their passkey to log the attacker's computer into the target account. This vulnerability was fixed in Firefox for iOS 142 and Focus for iOS 142.

NVD Source

Technical Analysis

CVE-2025-55031 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.