CVE-2026-21371
Buffer Over-read in WinBlast Driver
Memory Corruption when retrieving output buffer with insufficient size validation.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Buffer Over-read in WinBlast Driver
Memory Corruption when retrieving output buffer with insufficient size validation.
- Record
CVE-2026-21371- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-126
- Updated
- 2026-11-02
EUVDEUVD-2026-19321
Memory Corruption when retrieving output buffer with insufficient size validation.
- Record
EUVD-2026-19321- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-hfh3-pr7q-frpw
Memory Corruption when retrieving output buffer with insufficient size validation.
Memory Corruption when retrieving output buffer with insufficient size validation.
- Record
GHSA-hfh3-pr7q-frpw- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-126
- Updated
- 2026-11-02
NVD
Memory Corruption when retrieving output buffer with insufficient size validation.
- Record
CVE-2026-21371- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-126
- Updated
- 2026-11-02
Affected products
- qualcomm aqt1000 firmware
- qualcomm cologne firmware
- qualcomm fastconnect 6200 firmware
- qualcomm fastconnect 6700 firmware
- qualcomm fastconnect 6800 firmware
- qualcomm fastconnect 6900 firmware
- qualcomm fastconnect 7800 firmware
- qualcomm qca0000 firmware
- qualcomm qca6391 firmware
- qualcomm qca6420 firmware
- qualcomm qca6430 firmware
- qualcomm qcm5430 firmware
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- qualcomm qcm6490 firmware
- qualcomm sc8380xp firmware
- qualcomm sm6250 firmware
- qualcomm snapdragon 460 mobile platform firmware
- qualcomm snapdragon 662 mobile platform firmware
- qualcomm snapdragon 7c\+ gen 3 compute firmware
- qualcomm snapdragon 7c compute platform firmware
- qualcomm snapdragon 7c gen 2 compute platform firmware
- qualcomm snapdragon 8c compute platform \(sc8180xp-ad\) firmware
- qualcomm snapdragon 8c compute platform firmware
- qualcomm snapdragon 8cx compute platform \"poipu pro\" firmware
- qualcomm snapdragon 8cx compute platform firmware
- 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 firmware
- qualcomm video collaboration vc3 platform firmware
- qualcomm wcd9340 firmware
- qualcomm wcd9341 firmware
- qualcomm wcd9370 firmware
- qualcomm wcd9375 firmware
- qualcomm wcd9378c firmware
- qualcomm wcd9380 firmware
- qualcomm wcd9385 firmware
- qualcomm wcn3950 firmware
- qualcomm wcn3988 firmware
- qualcomm wsa8810 firmware
- qualcomm wsa8815 firmware
- qualcomm wsa8830 firmware
- qualcomm wsa8835 firmware
- qualcomm wsa8840 firmware
- qualcomm wsa8845 firmware
- qualcomm wsa8845h firmware
- qualcomm x2000077 firmware
- qualcomm x2000086 firmware
- qualcomm x2000090 firmware
- qualcomm x2000092 firmware
- qualcomm x2000094 firmware
- qualcomm xg101002 firmware
- qualcomm xg101032 firmware
- qualcomm xg101039 firmware
- qualcomm, inc. snapdragon
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-21371 is a high vulnerability (CVSS 7.8) in Qualcomm Aqt1000 Firmware, published April 6, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.10%, the 0th percentile. No source names a fixed version.