CVE-2026-21784 HCL IntelliOps Event Management is affected by multiple security vulnerabilities.
Missing or insecure Cross-Origin Security headers in HCL IntelliOps Event Management allow unauthorized external interaction and potential data exposure.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-21784?
CVE-2026-21784 is a medium-severity vulnerability in HCL Software IEM, published on 20 Aug 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
HCL IntelliOps Event Management (IEM) is affected by missing or insecure Cross-Origin Security headers. This issue makes the application's environment and resources susceptible to unauthorized external interaction and potential exploitation.
Weakness: CWE-200
Which versions are affected by CVE-2026-21784?
How do I fix CVE-2026-21784?
No fix has been published for CVE-2026-21784 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-21784 being exploited?
There is no known exploitation of CVE-2026-21784 in the wild and no public exploit code.
Sources
Also known as GHSA-hg5c-cxw6-wgq4.