CVE-2025-55177Vulnerability
Meta Platforms WhatsApp Incorrect Authorization Vulnerability
Reported by 2 independent sources · first reported by SecurityWeek · last reported
Last reported 25 days ago
Fix due 23 Sep 2025
Used by ransomware: not knownCISA KEV catalogue
higher than 91% of CVEsFIRST EPSS, as of 23 Oct 2026
What the reports say
2 reports, newest first · the exact sentence from each-
Apple Patches CoreGraphics Zero-Day Linked to Sophisticated Targeted Attacks“Last year, WhatsApp disclosed that a vulnerability in its iOS and macOS applications, tracked as CVE-2025-55177, was likely chained with Apple’s ImageIO zero-day CVE-2025-43300 in zero-click attacks against fewer than 200 users.”
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Apple Patches Meta-Reported Zero-Day Linked to ‘Extremely Sophisticated Attack’“…a’s involvement is noteworthy given a similar incident from last year, when WhatsApp said a vulnerability in its iOS and macOS apps (CVE-2025-55177) was likely used alongside the Apple ImageIO zero-day CVE-2025-43300 in zero-click attacks aimed at fewer than 200 users.”
Indicators reported together
named in the same reportsAlso named with it: CVE-2026-86950, CVE-2025-43300, CVE-2026-65660, CVE-2026-20700
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