CVE-2025-59439
Published: 03 February 2026
Summary
CVE-2025-59439 is a high-severity Uncontrolled Resource Consumption (CWE-400) vulnerability in Samsung Exynos 990 Firmware. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Application or System Exploitation (T1499.004); ranked at the 6.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Limiting concurrent sessions directly prevents uncontrolled resource consumption by capping the number of active sessions per user or account.
Analysis identifies uncontrolled resource consumption indicative of denial-of-service or abuse attempts.
Contingency plan testing includes resource exhaustion scenarios to verify recovery, making it harder for attackers to sustain exploits that cause uncontrolled consumption.
Updated contingency plans include current procedures to detect, contain, and recover from resource exhaustion, limiting an attacker's ability to sustain impact from uncontrolled consumption.
Alternate site allows resumption of operations if resource exhaustion at the primary site is exploited to cause unavailability.
Alternate telecommunications services enable resumption of essential functions when primary services become unavailable due to uncontrolled resource consumption.
The team can analyze and respond to resource exhaustion incidents, reducing the impact of attacks that exploit uncontrolled consumption weaknesses.
Timely maintenance support and spare parts enable rapid recovery from failures induced by uncontrolled resource consumption, shortening the impact window of denial-of-service attacks.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Malformed NAS messages enable remote exploitation of the endpoint to trigger crashes/resource exhaustion (DoS).
NVD Description
An issue was discovered in Samsung Mobile Processor, Wearable Processor and Modem Exynos 980, 990, 850, 1080, 9110, W920, W930, W1000 and Modem 5123. Incorrect handling of NAS Registration messages leads to a Denial of Service because of Improper Handling…
more
of Exceptional Conditions.
Deeper analysisAI
CVE-2025-59439 is a vulnerability affecting Samsung's Exynos mobile processors, wearable processors, and modems, specifically the Exynos 980, 990, 850, 1080, 9110, W920, W930, W1000, and Modem 5123 models. The flaw arises from incorrect handling of NAS Registration messages, resulting in a denial of service due to improper handling of exceptional conditions (CWE-400). Published on 2026-02-03, it carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), indicating high severity primarily due to its impact on availability.
A remote, unauthenticated attacker can exploit this vulnerability over the network with low attack complexity and no user interaction required. By sending malformed NAS Registration messages to affected devices, the attacker triggers exceptional conditions that lead to denial of service, such as device crashes or resource exhaustion, without compromising confidentiality or integrity.
Samsung Semiconductor has published product security updates addressing CVE-2025-59439, available at https://semiconductor.samsung.com/support/quality-support/product-security-updates/ and https://semiconductor.samsung.com/support/quality-support/product-security-updates/cve-2025-59439/. Security practitioners should consult these advisories for patching guidance and verify firmware updates on impacted Samsung devices.
Details
- CWE(s)