How severe is CVE-2026-9863?

CVE-2026-9863 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-9863 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-9863?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-9863 have an EU (EUVD) identifier?

Yes. CVE-2026-9863 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36731.

When was CVE-2026-9863 published?

CVE-2026-9863 was published on 2026-06-15 and last updated on 2026-06-17.

CVE-2026-9863

CVE-2026-9863 is a high-severity vulnerability with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-36731
Weakness: CWE-78
Published: 2026-06-15
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2026-9863?: 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.
How severe is CVE-2026-9863?: CVE-2026-9863 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-9863 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-9863?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-9863 have an EU (EUVD) identifier?: Yes. CVE-2026-9863 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36731.
When was CVE-2026-9863 published?: CVE-2026-9863 was published on 2026-06-15 and last updated on 2026-06-17.

References

https://www.fortra.com/security/advisories/product-security/fi-2026-008

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