Public proof of conceptFix available

CVE-2021-1965

A public proof of concept exists; no exploitation attested.

Published2021-07-13
WeaknessCWE-120 · CWE-20

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Possible buffer overflow due to lack of parameter length check during MBSSID scan IE parse in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Mobile, Snapdragon Wired Infrastructure and Networking

Timeline

dates in UTC

2021-07-1306:15CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-1965?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-1965?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Qualcomm aqt1000 firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Qualcomm ar9380 firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Qualcomm csr8811 firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

123 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

www.qualcomm.comPatch · Vendor Advisory

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 2 repositories, unverifiedsqrtrev/CVE-2021-1965foxtrot/CVE-2021-1965

Sources

CNACVSS 3.19.8read 2026-10-23
NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.010read 2026-10-23
NVDweakness (CWE)CWE-120, CWE-20read 2026-10-23
FIRST EPSSEPSS score3.0 %2026-10-22
PoC-in-GitHubproof of concept2read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2021-07-13
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-1965?

Is CVE-2021-1965 actively exploited?

Active exploitation of CVE-2021-1965 has not been confirmed. Its EPSS score was 3.0% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-1965?

CVE-2021-1965 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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