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CVE-2026-21366

Integer Overflow or Wraparound in Data Network Stack & Connectivity

CVSS score

7.8

EPSS probability

%0.1

Risk score

0.0

Published

2 mo ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

Impact on My Inventory

Only the personal products you have added to your account are assessed; an organisation's inventory does not appear here.

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-21366 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

Memory corruption while processing a packet with a size close to the maximum allowed value.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-21366 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1Qualcomm, Inc.Snapdragon View
2qualcommlemans au lgit firmware View
3qualcommlemans au lgit View
4qualcommlemansau firmware View
5qualcommlemansau View
6qualcommqam8255p firmware View
7qualcommqam8255p View
8qualcommqam8295p firmware View
9qualcommqam8295p View
10qualcommqam8620p firmware View
11qualcommqam8620p View
12qualcommqamsrv1h firmware View
13qualcommqamsrv1h View
14qualcommqamsrv1m firmware View
15qualcommqamsrv1m View
16qualcommqca6574au firmware View
17qualcommqca6574au View
18qualcommqca6595 firmware View
19qualcommqca6595 View
20qualcommqca6595au firmware View
21qualcommqca6595au View
22qualcommqca6688aq firmware View
23qualcommqca6688aq View
24qualcommqca6696 firmware View
25qualcommqca6696 View
26qualcommqca6698aq firmware View
27qualcommqca6698aq View
28qualcommqca6797aq firmware View
29qualcommqca6797aq View
30qualcommqca8695au firmware View
31qualcommqca8695au View
32qualcommsa6145p firmware View
33qualcommsa6145p View
34qualcommsa6150p firmware View
35qualcommsa6150p View
36qualcommsa6155p firmware View
37qualcommsa6155p View
38qualcommsa7255p firmware View
39qualcommsa7255p View
40qualcommsa7775p firmware View
41qualcommsa7775p View
42qualcommsa8145p firmware View
43qualcommsa8145p View
44qualcommsa8150p firmware View
45qualcommsa8150p View
46qualcommsa8155p firmware View
47qualcommsa8155p View
48qualcommsa8195p firmware View
49qualcommsa8195p View
50qualcommsa8255p firmware View
51qualcommsa8255p View
52qualcommsa8295p firmware View
53qualcommsa8295p View
54qualcommsa8540p firmware View
55qualcommsa8540p View
56qualcommsa8620p firmware View
57qualcommsa8620p View
58qualcommsa8770p firmware View
59qualcommsa8770p View
60qualcommsa9000p firmware View
61qualcommsa9000p View
62qualcommsrv1h firmware View
63qualcommsrv1h View
64qualcommsrv1l firmware View
65qualcommsrv1l View
66qualcommsrv1m firmware View
67qualcommsrv1m View
Total affected vendors: 2|Products: 67

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
7.8CVSS V3_1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCVE CNA
7.8CVSS V31HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
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-2026-21366 is associated with the following CWEs:

CWE-190: Integer Overflow or Wraparound

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-2026-21366 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/august-2026-bulletin.htmlvendor-advisory

CVSS Vector Radar Chart

7.8 / 10
Attack VectorLocalComplexityLowPrivilegesLowUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityHigh

Vulnerability Scoring Details

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

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

QI
Qualcomm, Inc. logo
Qualcomm, Inc.
Q
qualcomm logo
qualcomm

Weakness Type (CWE & CAPEC)

CWE-190

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
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