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CVE-2025-55177 is an improper authorization vulnerability in the linked-device synchronization mechanism of WhatsApp for iOS prior to 2.25.21.73, WhatsApp Business for iOS prior to 2.25.21.78, and WhatsApp for Mac prior to 2.25.21.78. Incomplete authorization checks on linked-device synchronization messages could allow an unrelated user to cause a target device to process content retrieved from an arbitrary URL. The flaw affects Apple-platform WhatsApp clients and has been assessed as potentially exploited in sophisticated targeted attacks when chained with Apple platform vulnerability CVE-2025-43300. The available information indicates the WhatsApp issue is a logic/authorization weakness in synchronization handling rather than a standalone memory-corruption bug.
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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.
143 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.
A WhatsApp-specific vulnerability that, when chained with CVE-2025-43300, enables a zero-click exploit.
A WhatsApp vulnerability affecting iOS and macOS clients, described as a zero-click issue and potentially exploited in the wild.
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.