Hostname disclosure via application logs and URLs
Published Mar 5, 2026 · Updated Mar 5, 2026
Information disclosure in HCL Sametime for iOS before 12.0.26 allows local users to read hostname information from logs and URLs. The client writes hostname values into its application logs and certain URLs, leaving locally readable artifacts that disclose infrastructure names. Exploitation requires low-privileged local access to the iOS device; the published impact is limited to hostname confidentiality.
Summary
What happened
Information disclosure in HCL Sametime for iOS before 12.0.26 allows local users to read hostname information from logs and URLs. The client writes hostname values into its application logs and certain URLs, leaving locally readable artifacts that disclose infrastructure names. Exploitation requires low-privileged local access to the iOS device; the published impact is limited to hostname confidentiality.
The record
- CVE
- CVE-2026-21786
- Published
- Mar 5, 2026
- Updated
- Mar 5, 2026
- Vendor
- HCLSoftware
- Product
- HCL Sametime
- Classifications
- CWE-532, T1533
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 5, 2026CVE publishedPublication date reported by the CVE source.
- Mar 5, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 12.0.26
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo