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CVE-2025-59699: Entrust nShield Connect XC, nShield 5c, and nShield HSMi through 13.6.11, or 13.7 (patched in 13.6.12 (LTS) an

35
Routine
MEDIUM 6.8UPGRADEUPGRADEUPGRADE

CVE-2025-59699 is a medium-severity flaw (CVSS 6.8) 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.

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 escalate privileges by booting from a USB device with a valid root filesystem. This occurs because of insecure default settings in the Legacy GRUB Bootloader.

Why this priority

  • Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score6.8 (Medium)
Attack vectorPhysical
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance0.3% (top 74%)
CISA exploited listNo
WeaknessCWE-290
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 and < 13.9.0
Fixed in: 13.6.12, 13.9.0
Safe to downgrade to: a release before 13.7
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 and < 13.9.0
Fixed in: 13.6.12, 13.9.0
Safe to downgrade to: a release before 13.7
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 and < 13.9.0
Fixed in: 13.6.12, 13.9.0
Safe to downgrade to: a release before 13.7
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 and < 13.9.0
Fixed in: 13.6.12, 13.9.0
Safe to downgrade to: a release before 13.7
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 and < 13.9.0
Fixed in: 13.6.12, 13.9.0
Safe to downgrade to: a release before 13.7
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.
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-2025-59699?

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-2025-59699 being exploited?

CVE-2025-59699 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-2025-59699 affect?

CVE-2025-59699 affects nshield 5c firmware, nshield hsmi firmware, nshield connect xc base firmware. Severity is medium (CVSS 6.8). 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 escalate privileges by booting from a USB device with a valid root files

How urgent is CVE-2025-59699?

Priority 35/100. Public exploit reference

Related CVEs

References

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