Quick answers
- Is CVE-2026-91423 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-91423 being exploited in the wild.
- How severe is CVE-2026-91423?
- Medium severity, with a CVSS score of 6, published 20 October 2026.
- Which products and versions are affected?
- Oracle Siebel CRM 17.0-26.9.
- Is there a fix for CVE-2026-91423?
- 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-2026-91423 attacked?
- It is attacked with local access, in a software library.
- Am I affected by CVE-2026-91423?
- Check whether you run Oracle Siebel CRM at an affected version. 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
A local privilege escalation vulnerability exists in the Siebel CRM Deployment Server Infrastructure component, exploitable by high-privileged attackers with logon access to the infrastructure. The vulnerability allows unauthorized creation, deletion, or modification of critical data, requiring local access (AV:L) and high privileges (PR:H) with no user interaction needed. No publicly available fix version is documented in the advisory.
Affected products
- Oracle Siebel CRM 17.0-26.9
Timeline
- 2026-10-20: disclosed