CVE-2020-26200Public exploit

Secure Boot bypass via unauthenticated UEFI modules

Published Feb 26, 2021 · Updated Aug 4, 2024

Authentication bypass in Kaspersky Rescue Disk and Endpoint Security allows physically proximate attackers to bypass UEFI Secure Boot. The shared custom boot loader accepts UEFI modules without adequately verifying authenticity, and Endpoint Security trusts it through the Full Disk Encryption Authentication Agent. Exploitation requires physical access, or local administrator privileges to replace the boot loader, and permits untrusted pre-OS code to run.

CVSS severity6.8
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Kaspersky Rescue Disk and Endpoint Security allows physically proximate attackers to bypass UEFI Secure Boot. The shared custom boot loader accepts UEFI modules without adequately verifying authenticity, and Endpoint Security trusts it through the Full Disk Encryption Authentication Agent. Exploitation requires physical access, or local administrator privileges to replace the boot loader, and permits untrusted pre-OS code to run.

The record

CVE
CVE-2020-26200
Published
Feb 26, 2021
Updated
Aug 4, 2024
Vendor
Kaspersky
Product
Kaspersky Rescue Disk
Classifications
CWE-287, T1542.003
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=All versions prior to 18.0.11.3 (patch C)

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Kaspersky · Kaspersky Rescue Diskversion=All versions prior to 18.0.11.3 (patch C)
Kaspersky · Kaspersky Endpoint Securityversion=10 SP2 MR2; version=10 SP2 MR3; version=11.0.0; version=11.0.1; version=11.1.0

Published CVSS scores

6.8INCIBE-CERTCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1542.003Pre-OS Boot: Bootkit

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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