CVE-2026-21374
Published: 06 April 2026
Summary
CVE-2026-21374 is a high-severity Buffer Over-read (CWE-126) vulnerability in Qualcomm Aqt1000 Firmware. Its CVSS base score is 7.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 0.4th 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 SI-10 (Information Input Validation) and SI-16 (Memory Protection).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly requires validation of information inputs like auxiliary sensor control commands to enforce buffer size checks and prevent buffer over-read memory corruption.
Implements memory safeguards such as address space randomization and non-executable memory to protect against exploitation of buffer over-read vulnerabilities.
Mandates timely identification, testing, and deployment of patches for known flaws like this Qualcomm buffer validation issue to remediate the vulnerability.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Local memory corruption in Qualcomm driver enables exploitation for privilege escalation to achieve arbitrary code execution.
NVD Description
Memory Corruption when processing auxiliary sensor input/output control commands with insufficient buffer size validation.
Deeper analysisAI
CVE-2026-21374 is a memory corruption vulnerability (CWE-126: Buffer Over-read) caused by insufficient buffer size validation when processing auxiliary sensor input/output control commands. It affects Qualcomm components, as documented in their security advisories.
The vulnerability has a CVSS v3.1 base score of 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), indicating it can be exploited by a local attacker with low privileges. Such an attacker requires low-complexity actions and no user interaction to trigger memory corruption, potentially achieving high impacts on confidentiality, integrity, and availability, such as arbitrary code execution or data exposure.
Qualcomm's April 2026 security bulletin (https://docs.qualcomm.com/product/publicresources/securitybulletin/april-2026-bulletin.html) provides details on affected products and mitigation guidance, including available patches.
Details
- CWE(s)