Raw vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:HSummary
CVE-2026-21381 is a high-severity Buffer Over-read (CWE-126) vulnerability in Qualcomm Ar8035 Firmware. Its CVSS base score is 7.6 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique OS Credential Dumping (T1003); ranked at the 5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SA-8 (Security and Privacy Engineering Principles) — see the control section below for these in your framework.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
CVE-2026-21381 is a transient denial-of-service (DoS) vulnerability stemming from a buffer over-read (CWE-126) that occurs when receiving a service data frame with excessive length during device matching over a Neighborhood Awareness Network (NAN) protocol connection. It affects Qualcomm components, as detailed in their security bulletin.
Exploitation requires network access (AV:N), high attack complexity (AC:H), high privileges (PR:H), and user interaction (UI:R), with a scoped impact (S:C) leading to high confidentiality, integrity, and availability consequences (C:H/I:H/A:H), scoring 7.6 on CVSS 3.1. A privileged attacker could thus trigger the transient DoS, potentially disrupting device functionality during NAN-based peer discovery.
Qualcomm's April 2026 security bulletin at https://docs.qualcomm.com/product/publicresources/securitybulletin/april-2026-bulletin.html provides further details on affected products and recommended mitigations or patches.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-19337
Vulnerability Data
Transient DOS when receiving a service data frame with excessive length during device matching over a neighborhood awareness network protocol connection.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Developer testing and evaluation (static analysis, fuzzing, bounds checking tests) directly finds buffer over-read flaws.
Engineering principles such as memory-safe design and bounds-checked abstractions structurally stop introduction of out-of-bounds reads.
Process isolation limits the blast radius of an over-read to the compromised domain.
Input validation enforces length and index constraints that prevent many externally triggered over-reads.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Secure development practices directly prevent introduction of buffer over-read weaknesses.
Vulnerability identification processes can discover buffer over-read flaws via scanning or review.
Patching or replacing vulnerable software removes known instances of buffer over-read bugs.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Security testing in development can detect buffer over-reads before release.
Secure SDLC mandates input validation and bounds checking that can prevent buffer over-reads.
Application security requirements can specify buffer-size and bounds-checking rules.
Secure architecture principles include memory-safety and bounds-checking design choices.
Secure coding standards directly require bounds-checked buffer access, mitigating over-reads.