2.7

CVE-2025-31966: hcl sametime Improper Input Validation

CVSS: 2.7v3.1LowAnalyzed
Published 17-03-2026Last modified 17-03-2026
Open JSON

Vulnerability summary

CVE-2025-31966 is a low (CVSS 2.7) Improper Input Validation vulnerability in hcl sametime. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.5% of scored vulnerabilities.

Overall risk
11/100
0100
Low · default modelHow is this calculated?
CVSS score
2.7/10
010
Low · v3.1 (CVE.org)
EPSS score
0.20%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 17-03-2026
    PublishedVulnerability first disclosed.
  2. 17-03-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

+0.01 pp

From 0.19% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.20%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Hcl1 product
Hcltech1 product

2 vendors · 2 products

References

1 links