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Nshield 5c Firmware CVE-2025-59703

| EUVDEUVD-2025-200272 CRITICAL
Improper Access Control (CWE-284)
2025-12-02 cve@mitre.org
9.1
CVSS 3.1 · Vendor: mitre
View

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Access control enforcement
MITRE ATT&CK

1 technique across 1 tactic: Defense Evasion

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

CVSS score of 9.1 (CRITICAL).

Act Now Prioritize within 24-48h. Why: CRITICAL severity + public POC available.
No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 15, 2026

Entrust nShield Connect XC, nShield 5c, and nShield HSMi through 13.6.11, or 13.7, 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.

Earlier versions of this analysis (1)
v1 Mar 15, 2026 - 14:04 CVSS 9.1

RemediationAI

Monitor vendor advisories for patches. Apply mitigations such as network segmentation, access restrictions, and monitoring.

Affected VersionsENISA

n/a n/a

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Improper Access Control (CWE-284).

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (mitre) PRIMARY 9.1 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Primary rating from Vendor (mitre) · only source for this CVE.

CVSS VectorVendor: mitre

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

Lifecycle Timeline

2
PoC Detected
Dec 08, 2025 - 19:39 vuln.today
Public exploit code
CVE Published
Dec 02, 2025 - 16:15 nvd
CRITICAL 9.1

Executive ViewAI

Why It Matters

Entrust HSM appliances (nShield Connect XC, nShield 5c, nShield HSMi up to versions 13.6.11/13.7) contain a critical physical tampering vulnerability allowing attackers with direct device access to extract cryptographic keys without detection. Organizations using these devices for key management in payment systems, PKI, or regulatory-sensitive environments face potential compromise of their entire cryptographic infrastructure.

Business Impact: Severe
Compensating Controls

Implement strict physical security controls: restrict device access to authorized personnel only via locked rooms/cages with access logging and video surveillance; establish tamper-evident seals and regular physical inspections with documented audit trails; consider air-gapped deployment or network segmentation to limit cryptographic key usage if devices are compromised; implement cryptographic key rotation policies and monitor for unauthorized key access or use; for critical applications, evaluate hardware security module alternatives pending patch availability; ensure all physical access attempts trigger alerts and investigation protocols.

Threat Intelligence Overview

EPSS Score
0.0%
Top 85% exploitable
Exploit
POC
Public exploit code exists
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC Yes
EPSS 0.0%
Patch available No
Active threat No
Deciding rule
CRITICAL severity + public POC available
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Out-of-Cycle
Exploitation· derived
Poc
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact
Very High

Priority Score

66
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +46
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

CVE-2025-59695 CRITICAL POC
9.8 Dec 02

Entrust nShield Connect XC, nShield 5c, and nShield HSMi through 13.6.11, or 13.7, allow a user with OS root access to a

CVE-2025-59693 CRITICAL POC
9.8 Dec 02

The Chassis Management Board in Entrust nShield Connect XC, nShield 5c, and nShield HSMi through 13.6.11, or 13.7, allow

CVE-2025-59702 HIGH POC
7.2 Dec 02

A privilege escalation vulnerability (CVSS 7.2) that allows a physically proximate attacker with elevated privileges. Ri

CVE-2025-59697 HIGH POC
7.2 Dec 02

Entrust nShield Connect XC, nShield 5c, and nShield HSMi through 13.6.11, or 13.7, allow a physically proximate attacker

CVE-2025-59705 MEDIUM POC
6.8 Dec 02

Entrust nShield Connect XC, nShield 5c, and nShield HSMi through 13.6.11, or 13.7, allow a Physically Proximate Attacker

CVE-2025-59699 MEDIUM POC
6.8 Dec 02

Entrust nShield Connect XC, nShield 5c, and nShield HSMi through 13.6.11, or 13.7, allow a physically proximate attacker

CVE-2025-59698 MEDIUM POC
6.8 Dec 02

CVE-2025-59698 is a security vulnerability (CVSS 6.8) that allows a physically proximate attacker. Risk factors: public

CVE-2025-59694 MEDIUM POC
6.8 Dec 02

CVE-2025-59694 is a security vulnerability (CVSS 6.8) that allows a physically proximate attacker. Risk factors: public

CVE-2025-59704 MEDIUM POC
4.6 Dec 02

Entrust nShield Connect XC, nShield 5c, and nShield HSMi through 13.6.11, or 13.7, allow an attacker to gain access the

CVE-2025-59701 MEDIUM POC
4.1 Dec 02

Entrust nShield Connect XC, nShield 5c, and nShield HSMi through 13.6.11, or 13.7, allow a physically proximate attacker

CVE-2025-59700 LOW POC
3.9 Dec 02

Entrust nShield Connect XC, nShield 5c, and nShield HSMi through 13.6.11, or 13.7, allow a physically proximate attacker

CVE-2025-59696 LOW POC
3.2 Dec 02

CVE-2025-59696 is a security vulnerability (CVSS 3.2) that allows a physically proximate attacker. Risk factors: public

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