What is CVE-2025-59703?

CVE-2025-59703 is a critical-severity vulnerability in Entrust Nshield 5c, classified under Improper Access Control. CVSS score: 9.1/10. Published 2025-12-02.

How severe is CVE-2025-59703?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Entrust Nshield 5c

CVE-2025-59703

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)), allow a Physically Proximate Attacker to access the internal components of the appliance, without leaving tamper evidence. To exploit this, the attacker needs to remove the tamper label and all fixing screws from the device without damaging it. This is called an F14 attack.

Published 2025-12-02 · last modified 2026-08-26.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.005 (38.7th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

www.entrust.com/use-case/why-use-an-hsm (Product)
github.com/google/security-research/security/advisories/GHSA-6q4x-m86j-gfwj (Exploit, Third Party Advisory)
www.entrust.com/knowledgebase/hardware/understanding-nshield-security-advisory-…
github.com/advisories/GHSA-h78c-68qv-3qg9

Frequently asked questions

What is CVE-2025-59703?: CVE-2025-59703 is a critical-severity vulnerability in Entrust Nshield 5c, classified under Improper Access Control. CVSS score: 9.1/10. Published 2025-12-02.
How severe is CVE-2025-59703?: Critical severity. CVSS v3 base score is 9.1 out of 10.