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Apexward Pulse
Type Vulnerability

Meta Platforms

Meta Platforms WhatsApp Incorrect Authorisation Vulnerability

1 sourceCVE-2025-55177

At a glance

Medium
7-day window, from the last update
ActiveConfirmed in-the-wild exploitation
Evidence-weighted, not popularity
Signal

Actively exploited in the wild — prioritise confirming exposure.

Why Medium

Medium rather than High: exposure is scored at a default because we cannot see your systems or suppliers. If you run or depend on Meta Platforms WhatsApp, treat it as High.

Briefing

There is no written leader briefing for this story yet. These questions come from the facts we hold.

Questions to ask IT

  • Do we run Meta Platforms WhatsApp, and is every instance on version v2.25.21.73 or later?
  • Is any of it reachable from the internet?
  • Have we checked whether it has already been used against us?
  • If it is not yet patched, what mitigation is in place, and will the fix be done by 11 Nov?

Next steps

  1. Confirm exposure, mitigation status and any service interruption risk.

Summary

  • Meta Platforms WhatsApp contains an incorrect authorisation vulnerability due to an incomplete authorisation of linked device synchronisation messages. This vulnerability could allow an unrelated user to trigger processing of content from an arbitrary URL on a target’s device.
  • CVE-2025-55177 is listed in known-exploited catalogue (exploitation in the wild)
  • Authoritative catalogues report active exploitation of this vulnerability.

Why this matters in the UK

  • Known-exploited catalogue reports exploitation in the wild

Products and services involved

5 reports

Part of Multiple vulnerabilities in software products

Pulse

Last checked 51m ago · Next recheck 10 Nov 2026, 04:09 UK time · 1 quiet check collapsed

Signal
9 Nov 2026, 04:09 UK time · 51m ago

in the next 30 days first recorded at 13.5% (elevated likelihood signal, not confirmed exploitation).

Elevated — confirm exposure; this is a probability signal, not confirmed exploitation.

EscalationDe-escalationCritical / liveWhat these mean
Drag to pan · Ctrl / ⌘ + scroll or pinch to zoom9 events

2 quiet checks hidden.

Sources

How we know

Statements extracted from sources. Higher confidence means stronger corroboration.

  • ConfirmedHeadline90% confidence

    Meta Platforms WhatsApp Incorrect Authorisation Vulnerability

  • ConfirmedSummary fact75% confidence

    Meta Platforms WhatsApp contains an incorrect authorisation vulnerability due to an incomplete authorisation of linked device synchronization messages. This vulnerability could allow an unrelated user to trigger processing of content from an arbitrary URL on a target’s device. Affects Meta Platforms WhatsApp. Known ransomware campaign use: Unknown.

  • ConfirmedCVE identifier95% confidence

    Event involves CVE-2025-55177

  • ConfirmedKnown-exploited catalogue98% confidence

    CVE-2025-55177 is listed in known-exploited catalogue (exploitation in the wild)