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7.8
HIGH CVSS 3.1
CVE-2026-21371
Buffer Over-read in WinBlast Driver
Overview
Description

Memory Corruption when retrieving output buffer with insufficient size validation.

Details
INFO

Published Date :

April 6, 2026, 4:16 p.m.

Last Modified :

April 8, 2026, 9:06 p.m.

Remotely Exploit :

No

Source :

[email protected]
Impact
Affected Products

The following products are affected by CVE-2026-21371 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Qualcomm aqt1000_firmware
2 Qualcomm qca6391_firmware
3 Qualcomm qca6420_firmware
4 Qualcomm qca6430_firmware
5 Qualcomm wcd9341_firmware
6 Qualcomm wcd9380_firmware
7 Qualcomm wcd9385_firmware
8 Qualcomm wcn3988_firmware
9 Qualcomm wsa8810_firmware
10 Qualcomm wsa8815_firmware
11 Qualcomm wsa8830_firmware
12 Qualcomm wsa8835_firmware
13 Qualcomm qcm6490_firmware
14 Qualcomm sm6250_firmware
15 Qualcomm snapdragon_662_mobile_platform_firmware
16 Qualcomm snapdragon_7c\+_gen_3_compute_firmware
17 Qualcomm wcd9340_firmware
18 Qualcomm wcd9370_firmware
19 Qualcomm wcd9375_firmware
20 Qualcomm wcn3950_firmware
21 Qualcomm fastconnect_6200_firmware
22 Qualcomm fastconnect_6800_firmware
23 Qualcomm fastconnect_6900_firmware
24 Qualcomm fastconnect_7800_firmware
25 Qualcomm fastconnect_6700_firmware
26 Qualcomm snapdragon_460_mobile_platform_firmware
27 Qualcomm snapdragon_7c_compute_platform_firmware
28 Qualcomm snapdragon_7c_gen_2_compute_platform_firmware
29 Qualcomm snapdragon_8c_compute_platform_firmware
30 Qualcomm snapdragon_8cx_compute_platform_firmware
31 Qualcomm snapdragon_8cx_gen_2_5g_compute_platform_firmware
32 Qualcomm snapdragon_8cx_gen_3_compute_platform_firmware
33 Qualcomm qca0000_firmware
34 Qualcomm wsa8840_firmware
35 Qualcomm wsa8845_firmware
36 Qualcomm wsa8845h_firmware
37 Qualcomm aqt1000
38 Qualcomm qca6391
39 Qualcomm qca6420
40 Qualcomm qca6430
41 Qualcomm sm6250
42 Qualcomm wcd9340
43 Qualcomm wcd9341
44 Qualcomm wcd9370
45 Qualcomm wcd9375
46 Qualcomm wcd9380
47 Qualcomm wcd9385
48 Qualcomm wcn3950
49 Qualcomm wcn3988
50 Qualcomm wsa8810
51 Qualcomm wsa8815
52 Qualcomm wsa8830
53 Qualcomm wsa8835
54 Qualcomm qca0000
55 Qualcomm qcm5430_firmware
56 Qualcomm sc8380xp_firmware
57 Qualcomm fastconnect_6700
58 Qualcomm fastconnect_6200
59 Qualcomm fastconnect_6800
60 Qualcomm fastconnect_6900
61 Qualcomm fastconnect_7800
62 Qualcomm qcm5430
63 Qualcomm qcm6490
64 Qualcomm sc8380xp
65 Qualcomm snapdragon_460_mobile_platform
66 Qualcomm snapdragon_662_mobile_platform
67 Qualcomm snapdragon_7c_compute_platform
68 Qualcomm snapdragon_7c_gen_2_compute_platform
69 Qualcomm snapdragon_7c\+_gen_3_compute
70 Qualcomm wsa8840
71 Qualcomm wsa8845
72 Qualcomm wsa8845h
73 Qualcomm snapdragon_8c_compute_platform
74 Qualcomm snapdragon_8cx_compute_platform
75 Qualcomm snapdragon_8cx_gen_2_5g_compute_platform
76 Qualcomm snapdragon_8cx_gen_3_compute_platform
77 Qualcomm video_collaboration_vc3_platform_firmware
78 Qualcomm video_collaboration_vc3_platform
79 Qualcomm snapdragon_8c_compute_platform_\(sc8180xp-ad\)_firmware
80 Qualcomm snapdragon_8c_compute_platform_\(sc8180xp-ad\)
81 Qualcomm wcd9378c_firmware
82 Qualcomm wcd9378c
83 Qualcomm x2000077_firmware
84 Qualcomm x2000077
85 Qualcomm x2000086_firmware
86 Qualcomm x2000086
87 Qualcomm x2000090_firmware
88 Qualcomm x2000090
89 Qualcomm x2000092_firmware
90 Qualcomm x2000092
91 Qualcomm x2000094_firmware
92 Qualcomm x2000094
93 Qualcomm xg101002_firmware
94 Qualcomm xg101002
95 Qualcomm xg101032_firmware
96 Qualcomm xg101032
97 Qualcomm xg101039_firmware
98 Qualcomm xg101039
99 Qualcomm cologne_firmware
100 Qualcomm cologne
101 Qualcomm snapdragon_8cx_compute_platform_\"poipu_pro\"_firmware
102 Qualcomm snapdragon_8cx_compute_platform_\"poipu_pro\"
103 Qualcomm snapdragon_8cx_gen_2_5g_compute_platform_\"poipu_pro\"_firmware
104 Qualcomm snapdragon_8cx_gen_2_5g_compute_platform_\"poipu_pro\"
: Total Affected Vendor : 1 | Products : 104
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH 2cfc7d3e-20d3-47ac-8db7-1b7285aff15f
CVSS 3.1 HIGH [email protected]
Solution
Apply security updates to fix memory corruption vulnerabilities related to output buffer handling.
  • Apply relevant security patches or updates from the vendor.
  • Validate output buffer sizes before data retrieval.
  • Review and test memory handling routines.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-21371.

URL Resource
https://docs.qualcomm.com/product/publicresources/securitybulletin/april-2026-bulletin.html Vendor Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-21371 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-21371 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-21371 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-21371 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Apr. 08, 2026

    Action Type Old Value New Value
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:aqt1000_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:aqt1000:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:cologne_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:cologne:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:fastconnect_6200_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:fastconnect_6200:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:fastconnect_6700_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:fastconnect_6700:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:fastconnect_6800_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:fastconnect_6800:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:fastconnect_6900_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:fastconnect_6900:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:fastconnect_7800_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:fastconnect_7800:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:qca0000_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:qca0000:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:qca6391_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:qca6391:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:qca6420_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:qca6420:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:qca6430_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:qca6430:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:qcm5430_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:qcm5430:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:qcm6490_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:qcm6490:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:video_collaboration_vc3_platform_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:video_collaboration_vc3_platform:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:sc8380xp_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:sc8380xp:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:sm6250_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:sm6250:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:snapdragon_460_mobile_platform_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:snapdragon_460_mobile_platform:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:snapdragon_662_mobile_platform_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:snapdragon_662_mobile_platform:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:snapdragon_7c_compute_platform_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:snapdragon_7c_compute_platform:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:snapdragon_7c_gen_2_compute_platform_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:snapdragon_7c_gen_2_compute_platform:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:snapdragon_7c+_gen_3_compute_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:snapdragon_7c+_gen_3_compute:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:snapdragon_8c_compute_platform_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:snapdragon_8c_compute_platform:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:snapdragon_8c_compute_platform_(sc8180xp-ad)_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:snapdragon_8c_compute_platform_(sc8180xp-ad):-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:snapdragon_8cx_compute_platform_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:snapdragon_8cx_compute_platform:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:snapdragon_8cx_compute_platform_"poipu_pro"_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:snapdragon_8cx_compute_platform_"poipu_pro":-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:snapdragon_8cx_gen_2_5g_compute_platform_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:snapdragon_8cx_gen_2_5g_compute_platform:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:snapdragon_8cx_gen_2_5g_compute_platform_"poipu_pro"_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:snapdragon_8cx_gen_2_5g_compute_platform_"poipu_pro":-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:snapdragon_8cx_gen_3_compute_platform_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:snapdragon_8cx_gen_3_compute_platform:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:wcd9340_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:wcd9340:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:wcd9341_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:wcd9341:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:wcd9370_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:wcd9370:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:wcd9375_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:wcd9375:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:wcd9378c_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:wcd9378c:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:wcd9380_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:wcd9380:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:wcd9385_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:wcd9385:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:wcn3950_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:wcn3950:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:wcn3988_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:wcn3988:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:wsa8810_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:wsa8810:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:wsa8815_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:wsa8815:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:wsa8830_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:wsa8830:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:wsa8835_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:wsa8835:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:wsa8840_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:wsa8840:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:wsa8845_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:wsa8845:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:wsa8845h_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:wsa8845h:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:x2000077_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:x2000077:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:x2000086_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:x2000086:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:x2000090_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:x2000090:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:x2000092_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:x2000092:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:x2000094_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:x2000094:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:xg101002_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:xg101002:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:xg101032_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:xg101032:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:xg101039_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:xg101039:-:*:*:*:*:*:*:*
    Added Reference Type Qualcomm, Inc.: https://docs.qualcomm.com/product/publicresources/securitybulletin/april-2026-bulletin.html Types: Vendor Advisory
  • New CVE Received by [email protected]

    Apr. 06, 2026

    Action Type Old Value New Value
    Added Description Memory Corruption when retrieving output buffer with insufficient size validation.
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Added CWE CWE-126
    Added Reference https://docs.qualcomm.com/product/publicresources/securitybulletin/april-2026-bulletin.html
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 7.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact