CVE-2025-55177

5.4 MEDIUM CISA KEV - Actively Exploited
Published: August 29, 2025 Modified: October 24, 2025

Description

Incomplete authorization of linked device synchronization messages in WhatsApp for iOS prior to v2.25.21.73, WhatsApp Business for iOS v2.25.21.78, and WhatsApp for Mac v2.25.21.78 could have allowed an unrelated user to trigger processing of content from an arbitrary URL on a target’s device. We assess that this vulnerability, in combination with an OS-level vulnerability on Apple platforms (CVE-2025-43300), may have been exploited in a sophisticated attack against specific targeted users.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://www.facebook.com/security/advisories/cve-2025-55177
Source: cve-assign@fb.com
Vendor Advisory
https://www.whatsapp.com/security/advisories/2025/
Source: cve-assign@fb.com
Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-55177
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
US Government Resource

3 reference(s) from NVD

Quick Stats

CVSS v3 Score
5.4 / 10.0
EPSS (Exploit Probability)
1.2%
78th percentile
Exploitation Status
Actively Exploited
Remediation due: 2025-09-23

Weaknesses (CWE)

Affected Vendors

whatsapp