CVE-2025-43706
Published: 05 January 2026
Summary
CVE-2025-43706 is a high-severity Uncontrolled Resource Consumption (CWE-400) vulnerability in Samsung Exynos 1080 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 27.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SC-5 (Denial-of-service Protection) and SC-6 (Resource Availability).
Deeper analysis
CVE-2025-43706 is a vulnerability discovered in the L2 layer of Samsung Mobile Processor, Wearable Processor, and Modem components, specifically affecting Exynos models 980, 990, 850, 1080, 2400, 1580, 9110, W920, W930, Modem 5123, and Modem 5400. The flaw arises from incorrect handling of RRC packets, leading to a denial of service condition. 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) and is classified under CWE-400 (Uncontrolled Resource Consumption). The CVE was published on 2026-01-05.
Attackers can exploit this vulnerability remotely over the network with low attack complexity, requiring no privileges, authentication, or user interaction. By sending malformed RRC packets to an affected device, an unauthenticated remote attacker can trigger a denial of service, disrupting the target's availability while having no impact on confidentiality or integrity.
Samsung Semiconductor provides details and mitigation through its product security updates on the support pages at https://semiconductor.samsung.com/support/quality-support/product-security-updates/ and https://semiconductor.samsung.com/support/quality-support/product-security-updates/cve-2025-43706/.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-0813
Vulnerability details
An issue was discovered in L2 in Samsung Mobile Processor, Wearable Processor, and Modem Exynos 980, 990, 850, 1080, 2400, 1580, 9110, W920, W930, Modem 5123, and Modem 5400. Incorrect handling of RRC packets leads to a Denial of Service.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Malformed RRC packet handling triggers remote DoS via system exploitation on affected endpoints.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly implements denial-of-service protections to block or mitigate remote exploitation via malformed RRC packets causing resource exhaustion in affected Exynos processors and modems.
Protects availability of system resources from uncontrolled consumption triggered by incorrect L2 handling of RRC packets, addressing the core CWE-400 issue.
Validates incoming RRC packets to prevent malformed inputs from reaching the vulnerable L2 layer and triggering the denial-of-service condition.