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CVE-2025-59694

MEDIUM

6.8

CVSS Score

Published: December 2, 2025 at 12:00 AM UTC

Updated: August 26, 2026 at 04:31 PM UTC

10 products affected across 1 vendorNshield Connect Xc Mid FirmwareNshield 5C FirmwareNshield Hsmi Firmware

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Severity

MEDIUM6.8

Exploit prediction

EPSS 0.3%

SSVC

PoC

Description

The Chassis Management Board in Entrust nShield Connect XC, nShield 5c, and nShield HSMi through 13.6.11, or 13.7, allows a physically proximate attacker to persistently modify firmware and influence the (insecurely configured) appliance boot process. To exploit this, the attacker must modify the firmware via JTAG or perform an upgrade to the chassis management board firmware. This is called F03.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Nshield 5C Firmware · Entrust

95%

v < 13.6.1213.7.3 ≤ v < 13.9.0

Affected range stops below 13.6.12, so it looks safe — our inference, not a vendor statement

Affected range stops below 13.9.0, so it looks safe — our inference, not a vendor statement

entrust-nshield-5c (same device)

Nshield Connect Xc Base Firmware · Entrust

95%

v < 13.6.1213.7.3 ≤ v < 13.9.0

Affected range stops below 13.6.12, so it looks safe — our inference, not a vendor statement

Affected range stops below 13.9.0, so it looks safe — our inference, not a vendor statement

entrust-nshield-connect-xc-base (same device)

Nshield Connect Xc High Firmware · Entrust

95%

v < 13.6.1213.7.3 ≤ v < 13.9.0

Affected range stops below 13.6.12, so it looks safe — our inference, not a vendor statement

Affected range stops below 13.9.0, so it looks safe — our inference, not a vendor statement

entrust-nshield-connect-xc-high (same device)

Nshield Connect Xc Mid Firmware · Entrust

95%

v < 13.6.1213.7.3 ≤ v < 13.9.0

Affected range stops below 13.6.12, so it looks safe — our inference, not a vendor statement

Affected range stops below 13.9.0, so it looks safe — our inference, not a vendor statement

entrust-nshield-connect-xc-mid (same device)

Nshield Hsmi Firmware · Entrust

95%

v < 13.6.1213.7.3 ≤ v < 13.9.0

Affected range stops below 13.6.12, so it looks safe — our inference, not a vendor statement

Affected range stops below 13.9.0, so it looks safe — our inference, not a vendor statement

entrust-nshield-hsmi (same device)

Nshield 5C · Entrustdevice

80%

All versions

Nshield Connect Xc Base · Entrustdevice

80%

All versions

Nshield Connect Xc High · Entrustdevice

80%

All versions

Nshield Connect Xc Mid · Entrustdevice

80%

All versions

Nshield Hsmi · Entrustdevice

80%

All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (4)

Product

Source: cverecord

https://www.entrust.com/use-case/why-use-an-hsm

ExploitThird Party Advisory

Source: cverecord

https://github.com/google/security-research/security/advisories/GHSA-6q4x-m86j-gfwj

Source: cverecord

https://www.entrust.com/knowledgebase/hardware/understanding-nshield-security-advisory-september-2025

Source: cverecord

https://github.com/advisories/GHSA-7gqq-6vwr-4g3v

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.8MEDIUMCISA-ADP

Attack Vector: PHYSICAL
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-1274

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