CVE-2025-55177
CVSS v3
5.4
MEDIUM
EPSS Score
4.7 %
exploit probability, as of 2026-10-19
CISA KEV
Yes
known exploited
Exploitation
—
SSVC status
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Affected and fixed versions
Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2025-55177 yet.
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.
CISA Known Exploited Vulnerability
- Date Added
- 2025-09-02
- Patch Due Date
- 2025-09-23
- Ransomware Use
- Unknown
Technical details
- Published
- 2025-08-29
Frequently asked questions
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.