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CVE-2025-55177 is an incomplete authorization vulnerability in the linked-device synchronization mechanism of WhatsApp for iOS, WhatsApp Business for iOS, and WhatsApp for Mac. An unrelated user can cause a target device to process content from an arbitrary URL through synchronization messages that are not adequately authorized. Fixed releases are WhatsApp for iOS 2.25.21.73, WhatsApp Business for iOS 2.25.21.78, and WhatsApp for Mac 2.25.21.78. The vulnerability may have been chained with the Apple ImageIO vulnerability CVE-2025-43300 in sophisticated, targeted zero-click attacks.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
146 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A historical WhatsApp vulnerability affecting its iOS and macOS applications that was reportedly likely chained with CVE-2025-43300 in zero-click attacks against fewer than 200 users.
A prior WhatsApp vulnerability affecting its iOS and macOS applications, reportedly used with CVE-2025-43300 in zero-click attacks targeting fewer than 200 users. It is included as contextual comparison to the newly reported Apple zero-day.
A WhatsApp linked-device synchronization vulnerability affecting iOS versions below 16.7.12 that can be used in a zero-click account takeover chain to establish a rogue WhatsApp client without alerting the victim.
A potentially involved iOS 16 vulnerability reportedly linked to the same zero-click WhatsApp account hijacking campaign, though its exact role is described as uncertain.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.