CVE-2026-21383: Qualcomm Snapdragon Cryptographic Issue in AES-GCM key wrapping

CVE-2026-21383 · Severity: high · CVSS 7.1 · Published 2026-07-06

A security flaw exists in several Qualcomm Snapdragon chipsets used in mobile, automotive, and industrial devices. The issue involves a weakness in how the hardware protects sensitive encryption keys, which could allow an attacker with local access to the device to compromise secure data. This could lead to the exposure of private information or the unauthorized modification of secure system components.

Technologies: Qualcomm Fastconnect 6900, Qualcomm Fastconnect 7800, Qualcomm Qca6595au, Qualcomm Qca6696, Qualcomm Sa8255p. Vendors: Qualcomm.

Quick answers

Is CVE-2026-21383 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-21383 being exploited in the wild.
How severe is CVE-2026-21383?
High severity, with a CVSS score of 7.1, published 6 July 2026.
Which products and versions are affected?
Qualcomm, Inc. Snapdragon FastConnect 6900, FastConnect 7800, QCA6595AU, QCA6696, QDU1000, SA8255P, and others.
Is there a fix for CVE-2026-21383?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-21383 attacked?
It is attacked with local access, in device firmware.
Am I affected by CVE-2026-21383?
Check whether you run Qualcomm Fastconnect 6900, Qualcomm Fastconnect 7800, Qualcomm Qca6595au or one of the others listed. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

This vulnerability (CWE-323) stems from the reuse of a nonce or initialization vector (IV) during AES-GCM key wrapping. AES-GCM requires a unique IV for every encryption operation to maintain its security properties; using a static IV allows an attacker with local access to potentially perform cryptographic attacks to recover the wrapped keys. The issue affects a wide range of Snapdragon platforms including Mobile, Auto, and Compute. Users should apply firmware updates provided by their device manufacturers as referenced in the July 2026 Qualcomm Security Bulletin.

Affected products

  • Qualcomm, Inc. Snapdragon FastConnect 6900, FastConnect 7800, QCA6595AU, QCA6696, QDU1000, SA8255P, and others

Timeline

  • 2026-07-06: advisory: Initial publication of the Qualcomm security bulletin and NVD entry.

References

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