How severe is CVE-2025-52639?

CVE-2025-52639 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2025-52639 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-52639?

CVE-2025-52639 primarily affects Hcltech Connections. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-52639?

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

Does CVE-2025-52639 have an EU (EUVD) identifier?

Yes. CVE-2025-52639 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198064.

When was CVE-2025-52639 published?

CVE-2025-52639 was published on 2025-11-18 and last updated on 2026-06-17.

CVE-2025-52639

CVE-2025-52639 is a low-severity vulnerability in Hcltech Connections with a CVSS 3.x base score of 3.5. 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-201.

Key facts

Severity: Low (CVSS 3.x base score 3.5)
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-198064
Weakness: CWE-201
Affected product: Hcltech Connections
Published: 2025-11-18
Last modified: 2026-06-17

Description

HCL Connections is vulnerable to a sensitive information disclosure vulnerability which could allow a user to obtain sensitive information they are not entitled to, caused by improper rendering of application data.

Frequently asked questions

What is CVE-2025-52639?: HCL Connections is vulnerable to a sensitive information disclosure vulnerability which could allow a user to obtain sensitive information they are not entitled to, caused by improper rendering of application data.
How severe is CVE-2025-52639?: CVE-2025-52639 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2025-52639 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-52639?: CVE-2025-52639 primarily affects Hcltech Connections. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-52639?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-52639 have an EU (EUVD) identifier?: Yes. CVE-2025-52639 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198064.
When was CVE-2025-52639 published?: CVE-2025-52639 was published on 2025-11-18 and last updated on 2026-06-17.

References

https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0124241

Affected products (11)

cpe:2.3:a:hcltech:connections:8.0:-:*:*:*:*:*:*
cpe:2.3:a:hcltech:connections:8.0:cumulative_release1:*:*:*:*:*:*
cpe:2.3:a:hcltech:connections:8.0:cumulative_release10:*:*:*:*:*:*
cpe:2.3:a:hcltech:connections:8.0:cumulative_release2:*:*:*:*:*:*
cpe:2.3:a:hcltech:connections:8.0:cumulative_release3:*:*:*:*:*:*
cpe:2.3:a:hcltech:connections:8.0:cumulative_release4:*:*:*:*:*:*
cpe:2.3:a:hcltech:connections:8.0:cumulative_release5:*:*:*:*:*:*
cpe:2.3:a:hcltech:connections:8.0:cumulative_release6:*:*:*:*:*:*
cpe:2.3:a:hcltech:connections:8.0:cumulative_release7:*:*:*:*:*:*
cpe:2.3:a:hcltech:connections:8.0:cumulative_release8:*:*:*:*:*:*
cpe:2.3:a:hcltech:connections:8.0:cumulative_release9:*:*:*:*:*:*

More vulnerabilities in Hcltech Connections

CVE-2020-4085 — Medium (CVSS 6.5): "HCL Connections is vulnerable to possible information leakage and could disclose sensitive information via stack trace…
CVE-2019-4209 — Medium (CVSS 6.1): HCL Connections v5.5, v6.0, and v6.5 contains an open redirect vulnerability which could be exploited by an attacker to…
CVE-2023-28018 — Medium (CVSS 5.5): HCL Connections is vulnerable to a denial of service, caused by improper validation on certain requests. Using a…
CVE-2020-4083 — Medium (CVSS 5.5): HCL Connections 6.5 is vulnerable to possible information leakage. Connections could disclose sensitive information via…
CVE-2026-21788 — Medium (CVSS 5.4): HCL Connections is vulnerable to a cross-site scripting attack where an attacker may leverage this issue to execute…
CVE-2024-30112 — Medium (CVSS 5.4): HCL Connections is vulnerable to a cross-site scripting attack where an attacker may leverage this issue to execute…

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