# CVE-2026-21371: Memory Corruption when retrieving output buffer with insufficient size validation.

Source: https://junglewise.ai/threats/cve-2026-21371-memory-corruption-when-retrieving-output-buffer-with-insufficient  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-06  
License: CC BY 4.0 with a link back

CVE-2026-21371 · Severity: high · CVSS 7.8 · Published 2026-04-06

Memory Corruption when retrieving output buffer with insufficient size validation.

Technologies: [Qualcomm Aqt1000](https://junglewise.ai/threats/technologies/aqt1000), [Qualcomm AQT1000 Firmware](https://junglewise.ai/threats/technologies/aqt1000-firmware), [Qualcomm Cologne](https://junglewise.ai/threats/technologies/cologne), [Qualcomm Cologne Firmware](https://junglewise.ai/threats/technologies/cologne-firmware), [Qualcomm FastConnect 6800 Firmware](https://junglewise.ai/threats/technologies/fastconnect-6800-firmware), [Qualcomm Fastconnect 6200](https://junglewise.ai/threats/technologies/fastconnect-6200), [Qualcomm Fastconnect 6200 Firmware](https://junglewise.ai/threats/technologies/fastconnect-6200-firmware), [Qualcomm Fastconnect 6700](https://junglewise.ai/threats/technologies/fastconnect-6700), [Qualcomm Fastconnect 6700 Firmware](https://junglewise.ai/threats/technologies/fastconnect-6700-firmware), [Qualcomm Fastconnect 6800](https://junglewise.ai/threats/technologies/fastconnect-6800), [Qualcomm Fastconnect 6900](https://junglewise.ai/threats/technologies/fastconnect-6900), [Qualcomm Fastconnect 6900 Firmware](https://junglewise.ai/threats/technologies/fastconnect-6900-firmware), [Qualcomm Fastconnect 7800](https://junglewise.ai/threats/technologies/fastconnect-7800), [Qualcomm Fastconnect 7800 Firmware](https://junglewise.ai/threats/technologies/fastconnect-7800-firmware), [Qualcomm Qca0000](https://junglewise.ai/threats/technologies/qca0000), [Qualcomm Qca0000 Firmware](https://junglewise.ai/threats/technologies/qca0000-firmware), [Qualcomm Qca6391](https://junglewise.ai/threats/technologies/qca6391), [Qualcomm Qca6391 Firmware](https://junglewise.ai/threats/technologies/qca6391-firmware), [Qualcomm Qca6420](https://junglewise.ai/threats/technologies/qca6420), [Qualcomm Qca6420 Firmware](https://junglewise.ai/threats/technologies/qca6420-firmware), [Qualcomm Qca6430](https://junglewise.ai/threats/technologies/qca6430), [Qualcomm Qca6430 Firmware](https://junglewise.ai/threats/technologies/qca6430-firmware), [Qualcomm Qcm5430](https://junglewise.ai/threats/technologies/qcm5430), [Qualcomm Qcm5430 Firmware](https://junglewise.ai/threats/technologies/qcm5430-firmware), [Qualcomm Qcm6490](https://junglewise.ai/threats/technologies/qcm6490), [Qualcomm Qcm6490 Firmware](https://junglewise.ai/threats/technologies/qcm6490-firmware), [Qualcomm Sc8380xp](https://junglewise.ai/threats/technologies/sc8380xp), [Qualcomm SC8380XP Firmware](https://junglewise.ai/threats/technologies/sc8380xp-firmware), [Qualcomm Sm6250](https://junglewise.ai/threats/technologies/sm6250), [Qualcomm SM6250 Firmware](https://junglewise.ai/threats/technologies/sm6250-firmware), [Qualcomm Snapdragon 460 Mobile Platform Firmware](https://junglewise.ai/threats/technologies/snapdragon-460-mobile-platform-firmware), [Qualcomm Snapdragon 460 Mobile Platform](https://junglewise.ai/threats/technologies/snapdragon-460-mobile-platform), [Qualcomm Snapdragon 662 Mobile Platform](https://junglewise.ai/threats/technologies/snapdragon-662-mobile-platform), [Qualcomm Snapdragon 662 Mobile Platform Firmware](https://junglewise.ai/threats/technologies/snapdragon-662-mobile-platform-firmware), [Qualcomm Snapdragon 7c Compute Platform](https://junglewise.ai/threats/technologies/snapdragon-7c-compute-platform), [Qualcomm Snapdragon 7c Compute Platform Firmware](https://junglewise.ai/threats/technologies/snapdragon-7c-compute-platform-firmware), [Qualcomm Snapdragon 7c Gen 2 Compute Platform](https://junglewise.ai/threats/technologies/snapdragon-7c-gen-2-compute-platform), [Qualcomm Snapdragon 7c Gen 2 Compute Platform Firmware](https://junglewise.ai/threats/technologies/snapdragon-7c-gen-2-compute-platform-firmware), [Qualcomm Snapdragon 7c\+ Gen 3 Compute](https://junglewise.ai/threats/technologies/snapdragon-7c-gen-3-compute), [Qualcomm Snapdragon 7c\+ Gen 3 Compute Firmware](https://junglewise.ai/threats/technologies/snapdragon-7c-gen-3-compute-firmware), [Qualcomm Snapdragon 8c Compute Platform](https://junglewise.ai/threats/technologies/snapdragon-8c-compute-platform), [Qualcomm Snapdragon 8c Compute Platform \(Sc8180xp-Ad\)](https://junglewise.ai/threats/technologies/snapdragon-8c-compute-platform-sc8180xp-ad), [Qualcomm Snapdragon 8c Compute Platform \(Sc8180xp-Ad\) Firmware](https://junglewise.ai/threats/technologies/snapdragon-8c-compute-platform-sc8180xp-ad-firmware), [Qualcomm Snapdragon 8c Compute Platform Firmware](https://junglewise.ai/threats/technologies/snapdragon-8c-compute-platform-firmware), [Qualcomm Snapdragon 8cx Compute Platform](https://junglewise.ai/threats/technologies/snapdragon-8cx-compute-platform), [Qualcomm Snapdragon 8cx Compute Platform \"Poipu Pro\"](https://junglewise.ai/threats/technologies/snapdragon-8cx-compute-platform-poipu-pro), [Qualcomm Snapdragon 8cx Compute Platform \"Poipu Pro\" Firmware](https://junglewise.ai/threats/technologies/snapdragon-8cx-compute-platform-poipu-pro-firmware), [Qualcomm Snapdragon 8cx Compute Platform Firmware](https://junglewise.ai/threats/technologies/snapdragon-8cx-compute-platform-firmware), [Qualcomm Snapdragon 8cx Gen 2 5g Compute Platform](https://junglewise.ai/threats/technologies/snapdragon-8cx-gen-2-5g-compute-platform), [Qualcomm Snapdragon 8cx Gen 2 5g Compute Platform \"Poipu Pro\"](https://junglewise.ai/threats/technologies/snapdragon-8cx-gen-2-5g-compute-platform-poipu-pro), [Qualcomm Snapdragon 8cx Gen 2 5g Compute Platform \"Poipu Pro\" Firmware](https://junglewise.ai/threats/technologies/snapdragon-8cx-gen-2-5g-compute-platform-poipu-pro-firmware), [Qualcomm Snapdragon 8cx Gen 2 5g Compute Platform Firmware](https://junglewise.ai/threats/technologies/snapdragon-8cx-gen-2-5g-compute-platform-firmware), [Qualcomm Snapdragon 8cx Gen 3 Compute Platform](https://junglewise.ai/threats/technologies/snapdragon-8cx-gen-3-compute-platform), [Qualcomm Snapdragon 8cx Gen 3 Compute Platform Firmware](https://junglewise.ai/threats/technologies/snapdragon-8cx-gen-3-compute-platform-firmware), [Qualcomm Video Collaboration Vc3 Platform](https://junglewise.ai/threats/technologies/video-collaboration-vc3-platform), [Qualcomm Video Collaboration Vc3 Platform Firmware](https://junglewise.ai/threats/technologies/video-collaboration-vc3-platform-firmware), [Qualcomm Wcd9340](https://junglewise.ai/threats/technologies/wcd9340), [Qualcomm Wcd9340 Firmware](https://junglewise.ai/threats/technologies/wcd9340-firmware), [Qualcomm Wcd9341](https://junglewise.ai/threats/technologies/wcd9341), [Qualcomm Wcd9341 Firmware](https://junglewise.ai/threats/technologies/wcd9341-firmware), [Qualcomm Wcd9370](https://junglewise.ai/threats/technologies/wcd9370), [Qualcomm Wcd9370 Firmware](https://junglewise.ai/threats/technologies/wcd9370-firmware), [Qualcomm Wcd9375](https://junglewise.ai/threats/technologies/wcd9375), [Qualcomm Wcd9375 Firmware](https://junglewise.ai/threats/technologies/wcd9375-firmware), [Qualcomm Wcd9378c](https://junglewise.ai/threats/technologies/wcd9378c), [Qualcomm Wcd9378c Firmware](https://junglewise.ai/threats/technologies/wcd9378c-firmware), [Qualcomm Wcd9380](https://junglewise.ai/threats/technologies/wcd9380), [Qualcomm Wcd9380 Firmware](https://junglewise.ai/threats/technologies/wcd9380-firmware), [Qualcomm Wcd9385](https://junglewise.ai/threats/technologies/wcd9385), [Qualcomm Wcd9385 Firmware](https://junglewise.ai/threats/technologies/wcd9385-firmware), [Qualcomm Wcn3950](https://junglewise.ai/threats/technologies/wcn3950), [Qualcomm Wcn3950 Firmware](https://junglewise.ai/threats/technologies/wcn3950-firmware), [Qualcomm Wcn3988](https://junglewise.ai/threats/technologies/wcn3988), [Qualcomm Wcn3988 Firmware](https://junglewise.ai/threats/technologies/wcn3988-firmware), [Qualcomm Wsa8810](https://junglewise.ai/threats/technologies/wsa8810), [Qualcomm Wsa8810 Firmware](https://junglewise.ai/threats/technologies/wsa8810-firmware), [Qualcomm Wsa8815](https://junglewise.ai/threats/technologies/wsa8815), [Qualcomm Wsa8815 Firmware](https://junglewise.ai/threats/technologies/wsa8815-firmware), [Qualcomm Wsa8830](https://junglewise.ai/threats/technologies/wsa8830), [Qualcomm Wsa8830 Firmware](https://junglewise.ai/threats/technologies/wsa8830-firmware), [Qualcomm Wsa8835](https://junglewise.ai/threats/technologies/wsa8835), [Qualcomm Wsa8835 Firmware](https://junglewise.ai/threats/technologies/wsa8835-firmware), [Qualcomm Wsa8840](https://junglewise.ai/threats/technologies/wsa8840), [Qualcomm Wsa8840 Firmware](https://junglewise.ai/threats/technologies/wsa8840-firmware), [Qualcomm Wsa8845](https://junglewise.ai/threats/technologies/wsa8845), [Qualcomm Wsa8845 Firmware](https://junglewise.ai/threats/technologies/wsa8845-firmware), [Qualcomm Wsa8845h](https://junglewise.ai/threats/technologies/wsa8845h), [Qualcomm Wsa8845h Firmware](https://junglewise.ai/threats/technologies/wsa8845h-firmware), [Qualcomm X2000077](https://junglewise.ai/threats/technologies/x2000077), [Qualcomm X2000077 Firmware](https://junglewise.ai/threats/technologies/x2000077-firmware), [Qualcomm X2000086](https://junglewise.ai/threats/technologies/x2000086), [Qualcomm X2000086 Firmware](https://junglewise.ai/threats/technologies/x2000086-firmware), [Qualcomm X2000090](https://junglewise.ai/threats/technologies/x2000090), [Qualcomm X2000090 Firmware](https://junglewise.ai/threats/technologies/x2000090-firmware), [Qualcomm X2000092](https://junglewise.ai/threats/technologies/x2000092), [Qualcomm X2000092 Firmware](https://junglewise.ai/threats/technologies/x2000092-firmware), [Qualcomm X2000094](https://junglewise.ai/threats/technologies/x2000094), [Qualcomm X2000094 Firmware](https://junglewise.ai/threats/technologies/x2000094-firmware), [Qualcomm Xg101002](https://junglewise.ai/threats/technologies/xg101002), [Qualcomm Xg101002 Firmware](https://junglewise.ai/threats/technologies/xg101002-firmware), [Qualcomm Xg101032](https://junglewise.ai/threats/technologies/xg101032), [Qualcomm Xg101032 Firmware](https://junglewise.ai/threats/technologies/xg101032-firmware), [Qualcomm Xg101039](https://junglewise.ai/threats/technologies/xg101039), [Qualcomm Xg101039 Firmware](https://junglewise.ai/threats/technologies/xg101039-firmware). Vendors: [Qualcomm](https://junglewise.ai/threats/vendors/qualcomm).

## Quick answers

**Is CVE-2026-21371 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-21371 being exploited in the wild.

**How severe is CVE-2026-21371?** High severity, with a CVSS score of 7.8, published 6 April 2026.

**Which products and versions are affected?** Qualcomm Aqt1000, Qualcomm AQT1000 Firmware, Qualcomm Cologne, Qualcomm Cologne Firmware and 100 more. The advisory does not name versions.

**Is there a fix for CVE-2026-21371?** 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.

**Am I affected by CVE-2026-21371?** Check whether you run Qualcomm Aqt1000, Qualcomm AQT1000 Firmware, Qualcomm Cologne 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.

## Affected products

- Qualcomm Aqt1000
- Qualcomm AQT1000 Firmware
- Qualcomm Cologne
- Qualcomm Cologne Firmware
- Qualcomm FastConnect 6800 Firmware
- Qualcomm Fastconnect 6200
- Qualcomm Fastconnect 6200 Firmware
- Qualcomm Fastconnect 6700
- Qualcomm Fastconnect 6700 Firmware
- Qualcomm Fastconnect 6800
- Qualcomm Fastconnect 6900
- Qualcomm Fastconnect 6900 Firmware
- Qualcomm Fastconnect 7800
- Qualcomm Fastconnect 7800 Firmware
- Qualcomm Qca0000
- Qualcomm Qca0000 Firmware
- Qualcomm Qca6391
- Qualcomm Qca6391 Firmware
- Qualcomm Qca6420
- Qualcomm Qca6420 Firmware
- Qualcomm Qca6430
- Qualcomm Qca6430 Firmware
- Qualcomm Qcm5430
- Qualcomm Qcm5430 Firmware
- Qualcomm Qcm6490
- Qualcomm Qcm6490 Firmware
- Qualcomm Sc8380xp
- Qualcomm SC8380XP Firmware
- Qualcomm Sm6250
- Qualcomm SM6250 Firmware
- Qualcomm Snapdragon 460 Mobile Platform Firmware
- Qualcomm Snapdragon 460 Mobile Platform
- Qualcomm Snapdragon 662 Mobile Platform
- Qualcomm Snapdragon 662 Mobile Platform Firmware
- Qualcomm Snapdragon 7c Compute Platform
- Qualcomm Snapdragon 7c Compute Platform Firmware
- Qualcomm Snapdragon 7c Gen 2 Compute Platform
- Qualcomm Snapdragon 7c Gen 2 Compute Platform Firmware
- Qualcomm Snapdragon 7c\+ Gen 3 Compute
- Qualcomm Snapdragon 7c\+ Gen 3 Compute Firmware
- Qualcomm Snapdragon 8c Compute Platform
- Qualcomm Snapdragon 8c Compute Platform \(Sc8180xp-Ad\)
- Qualcomm Snapdragon 8c Compute Platform \(Sc8180xp-Ad\) Firmware
- Qualcomm Snapdragon 8c Compute Platform Firmware
- Qualcomm Snapdragon 8cx Compute Platform
- Qualcomm Snapdragon 8cx Compute Platform \"Poipu Pro\"
- Qualcomm Snapdragon 8cx Compute Platform \"Poipu Pro\" Firmware
- Qualcomm Snapdragon 8cx Compute Platform Firmware
- Qualcomm Snapdragon 8cx Gen 2 5g Compute Platform
- Qualcomm Snapdragon 8cx Gen 2 5g Compute Platform \"Poipu Pro\"
- Qualcomm Snapdragon 8cx Gen 2 5g Compute Platform \"Poipu Pro\" Firmware
- Qualcomm Snapdragon 8cx Gen 2 5g Compute Platform Firmware
- Qualcomm Snapdragon 8cx Gen 3 Compute Platform
- Qualcomm Snapdragon 8cx Gen 3 Compute Platform Firmware
- Qualcomm Video Collaboration Vc3 Platform
- Qualcomm Video Collaboration Vc3 Platform Firmware
- Qualcomm Wcd9340
- Qualcomm Wcd9340 Firmware
- Qualcomm Wcd9341
- Qualcomm Wcd9341 Firmware
- Qualcomm Wcd9370
- Qualcomm Wcd9370 Firmware
- Qualcomm Wcd9375
- Qualcomm Wcd9375 Firmware
- Qualcomm Wcd9378c
- Qualcomm Wcd9378c Firmware
- Qualcomm Wcd9380
- Qualcomm Wcd9380 Firmware
- Qualcomm Wcd9385
- Qualcomm Wcd9385 Firmware
- Qualcomm Wcn3950
- Qualcomm Wcn3950 Firmware
- Qualcomm Wcn3988
- Qualcomm Wcn3988 Firmware
- Qualcomm Wsa8810
- Qualcomm Wsa8810 Firmware
- Qualcomm Wsa8815
- Qualcomm Wsa8815 Firmware
- Qualcomm Wsa8830
- Qualcomm Wsa8830 Firmware
- Qualcomm Wsa8835
- Qualcomm Wsa8835 Firmware
- Qualcomm Wsa8840
- Qualcomm Wsa8840 Firmware
- Qualcomm Wsa8845
- Qualcomm Wsa8845 Firmware
- Qualcomm Wsa8845h
- Qualcomm Wsa8845h Firmware
- Qualcomm X2000077
- Qualcomm X2000077 Firmware
- Qualcomm X2000086
- Qualcomm X2000086 Firmware
- Qualcomm X2000090
- Qualcomm X2000090 Firmware
- Qualcomm X2000092
- Qualcomm X2000092 Firmware
- Qualcomm X2000094
- Qualcomm X2000094 Firmware
- Qualcomm Xg101002
- Qualcomm Xg101002 Firmware
- Qualcomm Xg101032
- Qualcomm Xg101032 Firmware
- Qualcomm Xg101039
- Qualcomm Xg101039 Firmware

## Related threats

- [Qualcomm transient denial of service while parsing frame during channel usage](https://junglewise.ai/threats/cve-2026-25294-qualcomm-transient-denial-of-service-while-parsing-frame-during)
- [Qualcomm component memory corruption in buffer validation](https://junglewise.ai/threats/cve-2026-25290-qualcomm-component-memory-corruption-in-buffer-validation)
- [Qualcomm component use-after-free information disclosure](https://junglewise.ai/threats/cve-2026-25284-qualcomm-component-use-after-free-information-disclosure)
- [Qualcomm buffer overflow in external data handling](https://junglewise.ai/threats/cve-2026-25283-qualcomm-buffer-overflow-in-external-data-handling)
- [Qualcomm component out-of-bounds memory access in data processing](https://junglewise.ai/threats/cve-2026-25282-qualcomm-component-out-of-bounds-memory-access-in-data-processing)