CVE-2025-55177

MEDIUMCVSS 5.4Known Exploited

CISA Known Exploited Vulnerability

https://www.whatsapp.com/security/advisories/2025/ ; https://nvd.nist.gov/vuln/detail/CVE-2025-55177

Remediation deadline: September 23, 2025

Description

Meta Platforms WhatsApp contains an incorrect authorization vulnerability due to an incomplete authorization of linked device synchronization messages. This vulnerability could allow an unrelated user to trigger processing of content from an arbitrary URL on a target’s device.

Timeline

Published:August 29th, 2025 4:15 PM

Last modified:October 18th, 2026 9:10 PM

Added to KEV:September 2nd, 2025

CVSS Scoring

CVSS v3: 5.4 (MEDIUM)

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Affected Software

From NVD CPE configuration data

Vendors

Products

whatsappwhatsapp_business

Weaknesses (CWE)

CWE-863

References & Reports

Advisories, patches, and third-party reports

https://www.facebook.com/security/advisories/cve-2025-55177Vendor Advisory
https://www.whatsapp.com/security/advisories/2025/Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-55177US Government Resource

Source: NIST NVD · Data may lag official sources by up to one minute