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CVE-2025-59693

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-12-02 · updated 2026-08-26
• Weakness: CWE-269

Description

The Chassis Management Board in Entrust nShield Connect XC, nShield 5c, and nShield HSMi through 13.6.11, or 13.7 (patched in 13.6.12 (LTS) and 13.9.0 (STS)), allows a physically proximate attacker to obtain debug access and escalate privileges by bypassing the tamper label and opening the chassis without leaving evidence, and accessing the JTAG connector. This is called F02.

Affected products

• Entrust Nshield 5C Firmware: before 13.6.12; from 13.7.3 before 13.9.0 — fixed in 13.6.12, 13.9.0
• Entrust Nshield Connect Xc Base Firmware: before 13.6.12; from 13.7.3 before 13.9.0 — fixed in 13.6.12, 13.9.0
• Entrust Nshield Connect Xc High Firmware: before 13.6.12; from 13.7.3 before 13.9.0 — fixed in 13.6.12, 13.9.0
• Entrust Nshield Connect Xc Mid Firmware: before 13.6.12; from 13.7.3 before 13.9.0 — fixed in 13.6.12, 13.9.0
• Entrust Nshield Hsmi Firmware: before 13.6.12; from 13.7.3 before 13.9.0 — fixed in 13.6.12, 13.9.0

How to fix

Upgrade to a fixed version: Entrust Nshield 5C Firmware 13.6.12, 13.9.0; Entrust Nshield Connect Xc Base Firmware 13.6.12, 13.9.0; Entrust Nshield Connect Xc High Firmware 13.6.12, 13.9.0; Entrust Nshield Connect Xc Mid Firmware 13.6.12, 13.9.0; Entrust Nshield Hsmi Firmware 13.6.12, 13.9.0. Check the vendor advisory for mitigations.

References

• https://github.com/advisories/GHSA-j3px-xpp5-mpfc
• https://github.com/google/security-research/security/advisories/GHSA-6q4x-m86j-gfwj
• https://www.entrust.com/knowledgebase/hardware/understanding-nshield-security-advisory-september-2025
• https://www.entrust.com/use-case/why-use-an-hsm

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