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CVE-2026-21384

Out-of-bounds write in Qualcomm Fastconnect 6700 Firmware

CVSS score

5.3

EPSS probability

%0.1

Risk score

0.0

Published

3 mo ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Official patch verified

Etkilenen ürün ve sürüm için yayımlanan güvenlik güncellemesini uygulayın.

Impact on My Inventory

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-21384 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

Memory Corruption when updating prepared commands with invalid port indices based on user space input exceeds supported read client limits.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-21384 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1qualcommfastconnect 6700 firmware View
2qualcommfastconnect 6700 View
3qualcommfastconnect 6900 firmware View
4qualcommfastconnect 6900 View
5qualcommfastconnect 7800 firmware View
6qualcommfastconnect 7800 View
7qualcommlemans au lgit firmware View
8qualcommlemans au lgit View
9qualcommlemansau firmware View
10qualcommlemansau View
11qualcommnetrani firmware View
12qualcommnetrani View
13qualcommpandeiro firmware View
14qualcommpandeiro View
15qualcommqam8255p firmware View
16qualcommqam8255p View
17qualcommqamsrv1h firmware View
18qualcommqamsrv1h View
19qualcommqamsrv1m firmware View
20qualcommqamsrv1m View
21qualcommqca6595 firmware View
22qualcommqca6595 View
23qualcommqca6595au firmware View
24qualcommqca6595au View
25qualcommqca6678aq firmware View
26qualcommqca6678aq View
27qualcommqca6698aq firmware View
28qualcommqca6698aq View
29qualcommqca6698au firmware View
30qualcommqca6698au View
31qualcommqca6797aq firmware View
32qualcommqca6797aq View
33qualcommqcm4490 firmware View
34qualcommqcm4490 View
35qualcommqcm5430 firmware View
36qualcommqcm5430 View
37qualcommqcm6490 firmware View
38qualcommqcm6490 View
39qualcommqcm8838 firmware View
40qualcommqcm8838 View
41qualcommqcs4490 firmware View
42qualcommqcs4490 View
43qualcommqcs8550 firmware View
44qualcommqcs8550 View
45qualcommqln1083bd firmware View
46qualcommqln1083bd View
47qualcommqln1086bd firmware View
48qualcommqln1086bd View
49qualcommqpa1083bd firmware View
50qualcommqpa1083bd View
51qualcommqpa1086bd firmware View
52qualcommqpa1086bd View
53qualcommvideo collaboration vc3 platform firmware View
54qualcommvideo collaboration vc3 platform View
55qualcommqxm1093 firmware View
56qualcommqxm1093 View
57qualcommqxm1094 firmware View
58qualcommqxm1094 View
59qualcommqxm1095 firmware View
60qualcommqxm1095 View
61qualcommqxm1096 firmware View
62qualcommqxm1096 View
63qualcommsa7255p firmware View
64qualcommsa7255p View
65qualcommsa7775p firmware View
66qualcommsa7775p View
67qualcommsa8255p firmware View
68qualcommsa8255p View
69qualcommsa8620p firmware View
70qualcommsa8620p View
71qualcommsa8770p firmware View
72qualcommsa8770p View
73qualcommsa9000p firmware View
74qualcommsa9000p View
75qualcommsar2130p firmware View
76qualcommsar2130p View
77qualcommsc8380xp firmware View
78qualcommsc8380xp View
79qualcommsd 8 gen1 5g firmware View
80qualcommsd 8 gen1 5g View
81qualcommsd865 5g firmware View
82qualcommsd865 5g View
83qualcommsdr753 firmware View
84qualcommsdr753 View
85qualcommsm7435 firmware View
86qualcommsm7435 View
87qualcommsnapdragon 4 gen 2 mobile platform firmware View
88qualcommsnapdragon 4 gen 2 mobile platform View
89qualcommsnapdragon 460 mobile platform firmware View
90qualcommsnapdragon 460 mobile platform View
91qualcommsnapdragon 6 gen 1 mobile platform firmware View
92qualcommsnapdragon 6 gen 1 mobile platform View
93qualcommsnapdragon 6 gen 3 mobile platform firmware View
94qualcommsnapdragon 6 gen 3 mobile platform View
95qualcommsnapdragon 662 mobile platform firmware View
96qualcommsnapdragon 662 mobile platform View
97qualcommsnapdragon 7 gen 1 mobile platform firmware View
98qualcommsnapdragon 7 gen 1 mobile platform View
99qualcommsnapdragon 8 elite firmware View
100qualcommsnapdragon 8 elite View
101qualcommsnapdragon 8 gen 1 mobile platform firmware View
102qualcommsnapdragon 8 gen 1 mobile platform View
103qualcommsnapdragon ar1 gen 1 platform firmware View
104qualcommsnapdragon ar1 gen 1 platform View
105qualcommsnapdragon xr2 5g platform firmware View
106qualcommsnapdragon xr2 5g platform View
107qualcommsnapdragon xr2+ gen 1 platform firmware View
108qualcommsnapdragon xr2+ gen 1 platform View
109qualcommsrv1h firmware View
110qualcommsrv1h View
111qualcommsrv1m firmware View
112qualcommsrv1m View
113qualcommsxr2230p firmware View
114qualcommsxr2230p View
115qualcommsxr2330p firmware View
116qualcommsxr2330p View
117qualcommsxr2350p firmware View
118qualcommsxr2350p View
119qualcommwcd9370 firmware View
120qualcommwcd9370 View
121qualcommwcd9375 firmware View
122qualcommwcd9375 View
123qualcommwcd9380 firmware View
124qualcommwcd9380 View
125qualcommwcd9385 firmware View
126qualcommwcd9385 View
127qualcommwcn3950 firmware View
128qualcommwcn3950 View
129qualcommwcn3988 firmware View
130qualcommwcn3988 View
131qualcommwcn6755 firmware View
132qualcommwcn6755 View
133qualcommwcn7860 firmware View
134qualcommwcn7860 View
135qualcommwcn7861 firmware View
136qualcommwcn7861 View
137qualcommwcn7881 firmware View
138qualcommwcn7881 View
139qualcommwsa8810 firmware View
140qualcommwsa8810 View
141qualcommwsa8815 firmware View
142qualcommwsa8815 View
143qualcommwsa8830 firmware View
144qualcommwsa8830 View
145qualcommwsa8832 firmware View
146qualcommwsa8832 View
147qualcommwsa8835 firmware View
148qualcommwsa8835 View
149qualcommwsa8840 firmware View
150qualcommwsa8840 View
151qualcommwsa8845 firmware View
152qualcommwsa8845 View
153qualcommwsa8845h firmware View
154qualcommwsa8845h View
155qualcommxrv7209 firmware View
156qualcommxrv7209 View
157qualcommxrv9209 firmware View
158qualcommxrv9209 View
Total affected vendors: 1|Products: 158

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
5.3CVSS V31MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:LNVD
5.3CVSS V31MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:LNVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

2 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source
reference

Yama veya çözüm referansı

Open source
Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Apply the official update named in the evidence only to the matching product and version.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-21384 is associated with the following CWEs:

CWE-787: Out-of-bounds Write

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-2026-21384 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureYerel erişim
PermissionsLow
UserGerekmiyor

Official Sources and Advisories

https://docs.qualcomm.com/product/publicresources/securitybulletin/july-2026-bulletin.htmlpatch

CVSS Vector Radar Chart

5.3 / 10
Attack VectorLocalComplexityLowPrivilegesLowUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityLow

Vulnerability Scoring Details

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow privileges
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)Low

Yama doğrulandı

2 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

Follow the vendor

Q
qualcomm logo
qualcomm

Weakness Type (CWE & CAPEC)

CWE-787

Similar Vulnerabilities

6.5
CVE-2020-3702Vulnerability in Qualcomm, Inc. Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music, Snapdragon Wearables, Snapdragon Wired Infrastructure And Networking
QI
Qualcomm, Inc. logo
VendorQualcomm, Inc.ProductSnapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music, Snapdragon Wearables, Snapdragon Wired Infrastructure and Networking+27 etkilenen
Patch status unknownEPSS %06 y ago

Get this vulnerability through the API

Affected products, version ranges, exploitation status and patch information in a single request, with a free key.

Get a free keyDocumentation
curl -H "x-api-key: $DAYBREACH_API_KEY" \
  "https://api.daybreach.dev/api/v1/intel/cves/CVE-2026-21384"