How severe is CVE-2026-21753?

CVE-2026-21753 has a CVSS 3.x base score of 4.2, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-21753 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-21753?

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

When was CVE-2026-21753 published?

CVE-2026-21753 was published on 2026-08-25 and last updated on 2026-09-28.

CVE-2026-21753

CVE-2026-21753 is a medium-severity vulnerability with a CVSS 3.x base score of 4.2. 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-1104.

Key facts

Severity: Medium (CVSS 3.x base score 4.2)
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1104
Published: 2026-08-25
Last modified: 2026-09-28

Description

HCL Hive is affected by weak software supply chain governance, which could lead to the inclusion of vulnerable, unmaintained, or malicious third-party dependencies within the application environment.

Frequently asked questions

What is CVE-2026-21753?: HCL Hive is affected by weak software supply chain governance, which could lead to the inclusion of vulnerable, unmaintained, or malicious third-party dependencies within the application environment.
How severe is CVE-2026-21753?: CVE-2026-21753 has a CVSS 3.x base score of 4.2, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-21753 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-21753?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-21753 published?: CVE-2026-21753 was published on 2026-08-25 and last updated on 2026-09-28.

References

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

Other CWE-1104 vulnerabilities

CVE-2026-16634 — Critical (CVSS 9.8): TOML::XS versions before 0.06 for Perl bundle an unsupported and vulnerable version of tomlc99. The tomlc99 library is…
CVE-2026-3031 — Critical (CVSS 9.8): Image::EPEG versions through 0.15 for Perl embeds an unsupported version of the Epeg library. Image::EPEG includes…
CVE-2025-12104 — Critical (CVSS 9.8): Outdated and Vulnerable UI Dependencies might potentially lead to exploitation.This issue affects BLU-IC2: through…
CVE-2025-34192 — Critical (CVSS 9.8): Vasion Print (formerly PrinterLogic) Virtual Appliance Host versions prior to 22.0.893 and Application versions prior…
CVE-2025-10220 — Critical (CVSS 9.8): Use of Unmaintained Third Party Components (CWE-1104) in the NuGet dependency components in AxxonSoft Axxon One VMS…
CVE-2023-7102 — Critical (CVSS 9.8): Use of a Third Party library produced a vulnerability in Barracuda Networks Inc. Barracuda ESG Appliance which allowed…

Browse all CWE-1104 vulnerabilities →