CVE-2025-59699

Root access via USB storage enumeration

Published Dec 2, 2025 · Updated Aug 26, 2026

Privilege escalation in Entrust nShield appliances through 13.6.11 or 13.7 allows physically proximate attackers to gain root access via a USB drive. The Legacy GRUB configuration passes /dev/sda5 as the root device; an inserted USB drive enumerates as /dev/sda, causing the kernel to mount its fifth partition without authentication or verification. Direct access to an enabled front USB port during boot or the internal USB port is required, and the path compromises the server appliance rather than the embedded HSM or its cryptographic keys.

CVSS severity6.8
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in Entrust nShield appliances through 13.6.11 or 13.7 allows physically proximate attackers to gain root access via a USB drive. The Legacy GRUB configuration passes /dev/sda5 as the root device; an inserted USB drive enumerates as /dev/sda, causing the kernel to mount its fifth partition without authentication or verification. Direct access to an enabled front USB port during boot or the internal USB port is required, and the path compromises the server appliance rather than the embedded HSM or its cryptographic keys.

The record

CVE
CVE-2025-59699
Published
Dec 2, 2025
Updated
Aug 26, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-290, T1068
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 2, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.8CISA-ADPCVSS: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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-290Authentication Bypass by Spoofing
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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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