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CVE-2025-55177 is an incomplete authorization flaw in the handling of linked-device synchronization messages in 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. According to WhatsApp’s description, the issue could allow an unrelated user to trigger processing of content from an arbitrary URL on a target device. The vulnerable logic is in the authorization of synchronization messages associated with WhatsApp’s linked-device functionality, where insufficient validation of message origin/relationship permits unauthorized message-driven content processing. WhatsApp assessed that this vulnerability may have been exploited in the wild as part of a sophisticated attack chain together with Apple platform vulnerability CVE-2025-43300.
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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.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
140 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.