CVE-2025-59440 Samsung CVE debrief

Who should care

Defenders responsible for systems using affected Exynos chipsets, particularly those in sensitive operations or exposed to untrusted networks, should assess exposure and prioritize patching. This includes teams handling sensitive operations, security teams, and operators of affected platforms. They should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Why it matters

CVE-2025-59440 is a high-severity vulnerability in Samsung Exynos chipsets that can lead to a Denial of Service (DoS). Defenders should prioritize patching affected systems, particularly those handling sensitive operations or exposed to untrusted networks, and assess exposure.

• Potential Denial of Service (DoS) impacting availability
• Need to verify affected versions and patch levels
• Requires assessment of exposure for sensitive systems
• Remediation priority for exposed systems

Technical summary

The vulnerability affects various Samsung Exynos chipsets, including 980, 990, 850, 1080, 2100, 1280, 2200, 1330, 1380, 1480, 2400, 1580, 2500, 9110, W920, W930, W1000, Modem 5123, Modem 5300, and Modem 5400. Improper handling of SIM card proactive commands can lead to a DoS. Defenders should prioritize patching affected systems, particularly those handling sensitive operations or exposed to untrusted networks, and assess exposure. The vulnerability was publicly disclosed on April 6, 2026, and has not been modified since then.

Defensive priority

Defenders should prioritize patching affected systems, particularly those handling sensitive operations or exposed to untrusted networks.

Recommended defensive actions

• Patch affected Exynos chipsets
• Assess exposure and prioritize patching for sensitive systems
• Monitor for potential DoS attempts
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the affected chipsets and potential impact. Vendor advisories offer guidance on patching and mitigation. The vulnerability was publicly disclosed on April 6, 2026, and has not been modified since then. There are no known instances of exploitation, but defenders should verify affected versions and patch levels.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.