What is CVE-2026-21786?

CVE-2026-21786 is a low-severity vulnerability in Hclsoftware Sametime For iOS, classified under Insertion of Sensitive Information into Log File. CVSS score: 3.3/10. Published 2026-03-05.

How severe is CVE-2026-21786?

Low severity. CVSS v3 base score is 3.3 out of 10.

Information disclosure in Hclsoftware Sametime For iOS

CVE-2026-21786

HCL Sametime for iOS is impacted by a sensitive information disclosure. Hostnames information is written in application logs and certain URLs.

Published 2026-03-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.001 (0.8th percentile), scored 2026-09-28.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 0.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Hclsoftware Sametime For iOS — versions < 12.0.26
Hcltech Sametime

Weakness classification (CWE)

CWE-532 — Insertion of Sensitive Information into Log File

References

support.hcl-software.com/csm (Vendor Advisory)

Frequently asked questions

What is CVE-2026-21786?: CVE-2026-21786 is a low-severity vulnerability in Hclsoftware Sametime For iOS, classified under Insertion of Sensitive Information into Log File. CVSS score: 3.3/10. Published 2026-03-05.
How severe is CVE-2026-21786?: Low severity. CVSS v3 base score is 3.3 out of 10.