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Vulnerabilities

Vulnerability · CVE-2025-31966

HCL Sametime is vulnerable to broken server-side validation.

Published Mar 17, 2026 · catalog updated Jun 17, 2026 · HCL Sametime is vulnerable

Check if you run it

No confirmed exploitation is on record for CVE-2025-31966. EPSS is 0.20%. Act only if a listed version of HCL Sametime is vulnerable is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (HCL Sametime is vulnerable).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Low2.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.20%
Remediation
Advisory link
Affected products
cpe hcltech/sametime

HCL Sametime is vulnerable to broken server-side validation. While the application performs client-side input checks, these are not enforced by the web server. An attacker can bypass these restrictions by sending manipulated HTTP requests directly to the server.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe hcltech/sametimeversion unspecified

How to fix CVE-2025-31966

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-31966. EPSS is 0.20%. Act only if a listed version of HCL Sametime is vulnerable is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-20: Improper Input Validation. EPSS 0.20%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 17, 2026 · NIST NVD

    Detected

    HCL Sametime is vulnerable to broken server-side validation. While the application performs client-side input checks, these are not enforced by the web server. An attacker can bypass these restrictions by sending manipulated HTTP requests directly to the server.

  2. Jun 17, 2026 · NIST NVD

    Updated

    HCL Sametime is vulnerable to broken server-side validation. While the application performs client-side input checks, these are not enforced by the web server. An attacker can bypass these restrictions by sending manipulated HTTP requests directly to the server.

Sources

  • CVE.orgVulnerability recordCVE-2025-31966

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-31966

    30-day exploitation probability 0.2%

    first.org
  • NIST NVDVulnerability recordCVE-2025-31966

    HCL Sametime is vulnerable to broken server-side validation. While the application performs client-side input checks, these are not enforced by the web server. An attacker can bypass these restrictions by sending manipulated HTTP requests directly to the server.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.