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CVE-2025-59693: The Chassis Management Board in Entrust nShield Connect XC, nShield 5c, and nShield HSMi through 13.6.11, or 1

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CRITICAL 9.8REMOTEUPGRADEUPGRADEUPGRADE

CVE-2025-59693 is a critical-severity flaw (CVSS 9.8) affecting nshield 5c firmware, nshield hsmi firmware, nshield connect xc base firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

  • Critical severity
  • Public exploit reference
  • CISA SSVC: automatable with total technical impact
  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score9.8 (Critical)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance0.9% (top 40%)
CISA exploited listNo
WeaknessCWE-269
Published2025-12-02
Last modified2026-08-26
Publisher (CNA): MITRE · Vendor: entrust

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Last updated 2026-08-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

entrust nshield 5c firmware UPGRADE
Affected: < 13.6.12 · >= 13.7.3 and < 13.9.0
Fixed in: 13.6.12, 13.9.0
Safe to downgrade to: a release before 13.7.3
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
entrust nshield hsmi firmware UPGRADE
Affected: < 13.6.12 · >= 13.7.3 and < 13.9.0
Fixed in: 13.6.12, 13.9.0
Safe to downgrade to: a release before 13.7.3
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
entrust nshield connect xc base firmware UPGRADE
Affected: < 13.6.12 · >= 13.7.3 and < 13.9.0
Fixed in: 13.6.12, 13.9.0
Safe to downgrade to: a release before 13.7.3
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
entrust nshield connect xc mid firmware UPGRADE
Affected: < 13.6.12 · >= 13.7.3 and < 13.9.0
Fixed in: 13.6.12, 13.9.0
Safe to downgrade to: a release before 13.7.3
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
entrust nshield connect xc high firmware UPGRADE
Affected: < 13.6.12 · >= 13.7.3 and < 13.9.0
Fixed in: 13.6.12, 13.9.0
Safe to downgrade to: a release before 13.7.3
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Exact fixes by distribution

Fedora 46 · legofy · FIXED · 1.0.0-43.20261028git6913585.fc46 · FEDORA-2026-e1e60e1e32 · source
sudo dnf upgrade --advisory=FEDORA-2026-e1e60e1e32

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-59693?

nshield 5c firmware: upgrade to 13.6.12, 13.9.0; nshield hsmi firmware: upgrade to 13.6.12, 13.9.0; nshield connect xc base firmware: upgrade to 13.6.12, 13.9.0. Exact commands for each OS are on this page.

Is CVE-2025-59693 being exploited?

CVE-2025-59693 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-59693 affect?

CVE-2025-59693 affects nshield 5c firmware, nshield hsmi firmware, nshield connect xc base firmware. Severity is critical (CVSS 9.8). 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 privil

How urgent is CVE-2025-59693?

Priority 62/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Related CVEs

References

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