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Apexward Pulse
Type Vulnerability

Samsung · Memory corruption

Samsung Mobile Devices Out-of-Bounds Write Vulnerability

1 sourceCVE-2025-21042

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 Samsung Mobile, treat it as High.

Briefing

  • Do not treat uncorroborated claims as confirmed breaches.

Questions to ask IT

  • Do we run Samsung Mobile, and which versions?
  • 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 14 Nov?

Next steps

  1. Confirm exposure and remediation status for affected products

Summary

  • Samsung mobile devices contain an out-of-bounds write vulnerability in libimagecodec.
  • CVE-2025-21042 is confirmed as exploited in the wild (US known-exploited catalogue)
  • 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

4 reports

Part of Samsung and Alpine Linux vulnerabilities

Pulse

Last checked 18h ago · Next recheck 8 Nov 2026, 20:33 UK time

Signal
7 Nov 2026, 20:33 UK time · 18h ago

in the next 30 days first recorded at 35.6% (elevated likelihood signal, not confirmed exploitation). Suggested changed to 7d.

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

    Samsung Mobile Devices Out-of-Bounds Write Vulnerability

  • ConfirmedSummary fact75% confidence

    Samsung mobile devices contain an out-of-bounds write vulnerability in libimagecodec.

  • ConfirmedCVE identifier95% confidence

    Event involves CVE-2025-21042

  • ConfirmedKnown-exploited catalogue98% confidence

    CVE-2025-21042 is confirmed as exploited in the wild (US known-exploited catalogue)