How severe is CVE-2026-21754?

CVE-2026-21754 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-21754 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-21754?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-21754 published?

CVE-2026-21754 was published on 2026-08-25 and last updated on 2026-08-28.

CVE-2026-21754

CVE-2026-21754 is a medium-severity vulnerability with a CVSS 3.x base score of 5.4. 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-1004.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1004
Published: 2026-08-25
Last modified: 2026-08-28

Description

HCL Hive is affected by multiple infrastructure and network configuration vulnerabilities, which could lead to unauthorized lateral movement, container breakout, and sensitive data exposure within internal communications.

Frequently asked questions

What is CVE-2026-21754?: HCL Hive is affected by multiple infrastructure and network configuration vulnerabilities, which could lead to unauthorized lateral movement, container breakout, and sensitive data exposure within internal communications.
How severe is CVE-2026-21754?: CVE-2026-21754 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-21754 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-21754?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-21754 published?: CVE-2026-21754 was published on 2026-08-25 and last updated on 2026-08-28.

References

https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0133342

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