CVE-2025-59694
Low
No strong exploitation signal.
CVSS base
6.8
MEDIUM
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
0.3%
24.8th percentile
CISA KEV
Not listed
Weakness / dates
CWE-1274
Published 2025-12-02 · modified 2026-08-26
CVSS breakdown
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
| Attack Vector | P | Physical |
| Attack Complexity | L | Low |
| Privileges Required | N | None |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | H | High |
| Integrity | H | High |
| Availability | H | High |
Timeline
- 2025-12-02 — Published (NVD)
- 2026-08-26 — Last modified (NVD)
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 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
References
- https://github.com/advisories/GHSA-7gqq-6vwr-4g3v
- exploit 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
- exploit https://github.com/google/security-research/security/advisories/GHSA-6q4x-m86j-gfwj