CVE-2025-55177

Meta Platforms WhatsApp Incorrect Authorization Vulnerability

IN CISA KEV

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.

Vendor: Meta Platforms
Product: WhatsApp
CVSS: No score recorded (no NVD record loaded for this entry)
CWE: CWE-863
Published: Not recorded
NVD modified: Not recorded

CISA KEV

Date added: 2025-09-02
Due date: 2025-09-23
Ransomware use: Unknown
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

EPSS

4.73% chance of exploitation in the next 30 days (percentile 91st)

FIRST EPSS, updated 17 Oct 2026. About EPSS

CVSS is severity, EPSS is likelihood, KEV means already exploited. EPSS is a statistical probability, not a certainty: a low score does not make a bug safe, and a high one does not prove it is being exploited.

Data last updated 18 Oct 2026. Sources: NVD API 2.0, CISA KEV catalog, FIRST EPSS. Links: NVD, CISA KEV. Metadata only. ThreatWire does not host exploit code.