CVE-2025-55177

MediumCVSS 5.4/10Known exploited (CISA KEV)Last modified Oct 18, 2026

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.

Metrics

CVSS 3.1 5.4/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Weakness enumeration

Affected software

No affected versions have been published.

Timeline

Published
Aug 29, 2025
Last modified
Oct 18, 2026
Added to CISA KEV
Sep 2, 2025
NVD status
Analyzed

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CVE-2025-55177: Medium severity, CVSS 5.4 | Vulnix