🛡️ CVE-2025-59694 — nshield-5c-firmware

How this vulnerability can be exploited

This issue can be reached with physical access to the device, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

• Attack vector: Physical — the attacker has to touch the device.
• Attack complexity: Low — the attack works reliably, with no preparation.
• Privileges required: None — an unauthenticated stranger can try it.
• User interaction: None — nobody has to be tricked into anything.
• Scope: Unchanged — the damage stays inside the vulnerable component.
• Confidentiality impact: High — total loss, or loss the attacker controls.
• Integrity impact: High — total loss, or loss the attacker controls.
• Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2025-59694 is classified as CWE-1274: Improper Access Control for Volatile Memory Containing Boot Code. The product conducts a secure-boot process that transfers bootloader code from Non-Volatile Memory (NVM) into Volatile Memory (VM), but it does not have sufficient access control or other protections for the Volatile Memory.

Affected software

CVE-2025-59694 is recorded against 5 packages.

• nshield-5c-firmware (from 13.7.3 up to 13.9.0)
• nshield-connect-xc-base-firmware (from 13.7.3 up to 13.9.0)
• nshield-connect-xc-high-firmware (from 13.7.3 up to 13.9.0)
• nshield-connect-xc-mid-firmware (from 13.7.3 up to 13.9.0)
• nshield-hsmi-firmware (from 13.7.3 up to 13.9.0)

Timeline and source

Published on 2 December 2025 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from NVD.

References

github.com
www.entrust.com
github.com

Other advisories for this package

nshield-5c-firmware has other advisories on record. If you are patching this one, these are worth checking on the same host:

• CVE-2025-59705 (6.8 Medium, published 2 Dec 2025)
• CVE-2025-59698 (6.8 Medium, published 2 Dec 2025)
• CVE-2025-59704 (4.6 Medium, published 2 Dec 2025)
• CVE-2025-59697 (7.2 High, published 2 Dec 2025)
• CVE-2025-59703 (9.1 Critical, published 2 Dec 2025)
• CVE-2025-59696 (3.2 Low, published 2 Dec 2025)
• CVE-2025-59702 (7.2 High, published 2 Dec 2025)
• CVE-2025-59695 (9.8 Critical, published 2 Dec 2025)

Same weakness in other software

These advisories are the same class of weakness (CWE-1274: Improper Access Control for Volatile Memory Containing Boot Code) in other software:

• CVE-2024-36345 (published 15 May 2026)
• CVE-2025-29950 (published 10 Feb 2026)
• CVE-2025-59404 (7.5 High, published 25 Sep 2025)
• CVE-2025-4043 (6.8 Medium, published 7 May 2025)
• CVE-2023-31345 (7.5 High, published 12 Feb 2025)
• CVE-2022-2484 (8.4 High, published 6 Jan 2023)
• CVE-2022-2482 (8.4 High, published 6 Jan 2023)

Details

Affected Packages

References