Cyber Resilience

CVE-2026-21383

Qualcomm Fastconnect 6900 Firmware

Published
06 July 2026
Modified
08 July 2026
Patch / advisory
View advisory
CVSS Score v3.1 7.1
Click a component to see what it means
Raw vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS Score 0.00069 0.0th percentile
Risk Priority 49 floored blend · peak EPSS

Summary

CVE-2026-21383 is a high-severity Reusing a Nonce, Key Pair in Encryption (CWE-323) vulnerability in Qualcomm Fastconnect 6900 Firmware. Its CVSS base score is 7.1 (High).

Operationally, ranked at the 0.0th 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.

OWASP Top 10 for Web (2025)

A04:2025 Cryptographic Failures

EU & UK References

Vulnerability Data

Cryptographic Issue when using a static initialization vector for AES-GCM key wrapping, which requires a unique value for each call to ensure security.

CWE(s)
CWE-323

Related Threats

CVEs Like This One

CVE-2025-47345Same product: Qualcomm Fastconnect 6900
CVE-2025-47378Same product: Qualcomm Fastconnect 6900
CVE-2025-47385Same product: Qualcomm Fastconnect 6900
CVE-2025-59606Same product: Qualcomm Fastconnect 6900
CVE-2024-38399Same product: Qualcomm Fastconnect 6900
CVE-2025-59615Same product: Qualcomm Fastconnect 6900
CVE-2026-21366Same product: Qualcomm Lemans Au Lgit
CVE-2025-47372Same product: Qualcomm Qam8255P
CVE-2026-24082Same product: Qualcomm Fastconnect 6900
CVE-2026-24092Same product: Qualcomm Fastconnect 6900

Affected Assets

qualcomm
fastconnect 6900 firmware
all versions
qualcomm
fastconnect 7800 firmware
all versions
qualcomm
lemans au lgit firmware
all versions
qualcomm
lemansau firmware
all versions
qualcomm
pandeiro firmware
all versions
qualcomm
qam8255p firmware
all versions
qualcomm
qam8397p firmware
all versions
qualcomm
qam8797p firmware
all versions
qualcomm
qamsrv1h firmware
all versions
qualcomm
qamsrv1m firmware
all versions
+43 more product configuration(s) — see NVD for full list

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V6.8.3
  • V11.3.4

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation good match

Developer testing and evaluation can discover nonce reuse through static analysis, fuzzing, or known-answer tests.

SA-8 Security and Privacy Engineering Principles partial match

Engineering principles include correct use of cryptographic primitives such as unique nonces per key.

SC-13 Cryptographic Protection partial match

Selecting and implementing appropriate cryptographic algorithms and modes reduces nonce-reuse exposure.

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.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly prevent nonce/key reuse errors in cryptographic implementations.

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.

A.8.24 Use of cryptography mostly match
prevents

Mandates proper cryptographic key and nonce management, directly preventing nonce/key-pair reuse.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing can detect nonce reuse, yet the control addresses many other issues beyond this CWE.

A.8.28 Secure coding partial match
prevents

Secure-coding rules can require unique nonces, but the control is broader than this single weakness.

References