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 v4.0 Metrics
Exploitability
Attack VectorPhysical
ComplexityLow
RequirementsPresent
PrivilegesNone
User InteractionNone
Threat
Exploit MaturityUnreported
Vulnerable System
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Subsequent System
ConfidentialityNone
IntegrityNone
AvailabilityNone
Supplemental
SafetyNegligible
AutomatableYes
RecoveryAutomatic
Value DensityConcentrated
UrgencyMedium
Change Log
| Date | Source | Changes | Score |
|---|
| 2026-07-21 | nvd | AC: H→L, PR: H→N, UI: A→N, VC: N→H, VI: N→H, VA: N→H | 0.0 → 2.0 |
| 2026-07-21 | cve.org | initial, patch: Unavailable | 0.0 |
Affected Software
| Vendor | Product | Version |
|---|
| kaspersky | endpoint_security | 10 |
| kaspersky | endpoint_security | 11.0.0 |
| kaspersky | endpoint_security | 11.0.1 |
| kaspersky | endpoint_security | 11.1.0 |
| kaspersky | rescue_disk | < 18.0.11.3 |
| N/A | Kaspersky Endpoint Security with the Full Disk Encryption component installed | 10 SP2 MR2 |
| N/A | Kaspersky Endpoint Security with the Full Disk Encryption component installed | 10 SP2 MR3 |
| N/A | Kaspersky Endpoint Security with the Full Disk Encryption component installed | 11.0.0 |
| N/A | Kaspersky Endpoint Security with the Full Disk Encryption component installed | 11.0.1 |
| N/A | Kaspersky Endpoint Security with the Full Disk Encryption component installed | 11.1.0 |
| N/A | Kaspersky Rescue Disk Version | < 18.0.11.3 (patch C) |
Published: 2021-02-26
