CVE-2026-9863: Fortra BoKS Manager contains an OS command injection vulnerability in the client upgrade and patch tooling for

Routine

HIGH 7.5UPGRADE

CVE-2026-9863 is a high-severity flaw (CVSS 7.5) affecting core privileged access manager server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Fortra BoKS Manager contains an OS command injection vulnerability in the client upgrade and patch tooling for legacy tar-based client installations. A malicious or compromised legacy tar-installed client selected for upgrade or patching may be able to cause commands to be executed on the BoKS Master during client version handling.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.6% (top 52%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-06-15
Last modified	2026-10-25

Publisher (CNA): Fortra · Vendor: fortra

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-15 16:16 UTCPublished CVE record published
2026-10-25 23:10 UTCUpdated Record last modified

fortra core privileged access manager server UPGRADE

Affected: >= 8.1.0.0 and < 8.1.0.23 · >= 9.0.0.0 and < 9.0.0.5

Fixed in: 8.1.0.23, 9.0.0.5

Safe to downgrade to: a release before 8.1.0.0

1. Check installed version

apt-cache policy core-privileged-access-manager-server || rpm -q core-privileged-access-manager-server || core-privileged-access-manager-server --version

2. UPGRADE to 8.1.0.23 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade core-privileged-access-manager-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade core-privileged-access-manager-server

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 8.1.0.0 (Debian / Ubuntu)

apt-cache madison core-privileged-access-manager-server sudo apt install core-privileged-access-manager-server=<VERSION_BEFORE_8.1.0.0> sudo apt-mark hold core-privileged-access-manager-server

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list core-privileged-access-manager-server sudo dnf downgrade core-privileged-access-manager-server-<VERSION_BEFORE_8.1.0.0> sudo dnf versionlock add core-privileged-access-manager-server

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-9863?

core privileged access manager server: upgrade to 8.1.0.23, 9.0.0.5. Exact commands for each OS are on this page.

Is CVE-2026-9863 being exploited?

CVE-2026-9863 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-2026-9863 affect?

CVE-2026-9863 affects core privileged access manager server. Severity is high (CVSS 7.5). Fortra BoKS Manager contains an OS command injection vulnerability in the client upgrade and patch tooling for legacy tar-based client installations. A malicious or compromised legacy tar-installed client selected for upgrade or patching ma

How urgent is CVE-2026-9863?

Priority 38/100. High severity

Related CVEs

CVE-2026-9862 CRITICAL 9.8 UPGRADE Fortra's Core Privileged Access Manager (BoKS) contains an OS command injection vulnerability in the boks_aut

References

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