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Vulnerability record · CVE-2020-26200 · published 26 February 2021

CVE-2020-26200: Kaspersky endpoint security improper authentication vulnerability

Kaspersky · Endpoint Security

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.

6.8 CVSS 3.1 Medium EPSS 0.23% · top 87.4% CWE-287 · Improper authentication
6.8CVSS 3.1 base score, v2 4.6
0.23%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://support.kaspersky.com/general/vulnerability.aspx?el=12430#170221 Broken Link
https://github.com/CVEProject/cvelist/blob/master/2020/26xxx/CVE-2020-26200.json Third Party Advisory
https://support.kaspersky.com/general/vulnerability.aspx?el=12430#170221 Broken Link

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-26200), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.