CVE-2025-55177
Actively exploited. CVE-2025-55177 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-09-02) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
Public exploit code is available. Proof-of-concept or working exploit code for CVE-2025-55177 is indexed in GitHub PoC. Expect opportunistic scanning and exploitation attempts — prioritize remediation.
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.
CSIRTS triage
- What
- An incorrect authorization vulnerability allows unrelated users to trigger processing of content from arbitrary URLs.
- Who is affected
- Users of WhatsApp with linked devices.
- Urgency
- Remediation is urgent as the vulnerability is actively exploited and is critical in severity.
- Action
- Users should update to the latest version of WhatsApp.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 90% of all EPSS-scored CVEs.
Exploit availability
Public exploit or proof-of-concept code for CVE-2025-55177 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.
- GitHub PoCPublic proof-of-concept repositories on GitHub reference this CVE.look it up ↗
Advisory coverage (1)
- criticalexploitedCVE-2025-55177: Meta Platforms WhatsApp Incorrect Authorization Vulnerabilitycisa-kev · 2025-09-02
External references
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