Quick answers
- Is CVE-2026-108015 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-108015 being exploited in the wild.
- How severe is CVE-2026-108015?
- Informational severity, published 27 October 2026.
- Which products and versions are affected?
- HCL Notes Client.
- Is there a fix for CVE-2026-108015?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-108015 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-108015?
- Check whether you run HCL Notes Client. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The compromise of eMudhra intermediate CA private keys allows an unauthenticated network attacker to forge certificates that will be trusted by HCL Notes Client for outbound connections. No authentication or user interaction is required; the attacker only needs network access between the client and the target server. Successful exploitation enables interception and modification of encrypted business communications handled by Notes Client.
Affected products
- HCL Notes Client
Timeline
- 2026-10-27: disclosed