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CVE-2025-55177: Meta Platforms WhatsApp Incorrect Authorization Vulnerability
Meta Platforms WhatsApp · in CISA KEV since 2025-09-02
2025-09-02added to KEV
2025-09-23federal remediation due date
4.30%EPSS exploit probability (30 days) 90.7th percentile
5.4 MEDIUMCVSS 3.1
Unknownknown ransomware use
4days from NVD publication to KEV
What it is
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.
Required action (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
| CWE | CWE-863 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
| NVD published | 2025-08-29 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2025-55177.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.