CVE-2026-91364 Oracle Corporation CVE debrief

Who should care

Defenders responsible for Siebel CRM Cloud Applications, specifically those managing versions 22.3-26.9, should assess exposure and prioritize patching due to a medium-severity vulnerability allowing potential unauthorized data access or modification. Defenders should review and apply Oracle's security patches, restrict access to the physical communication segment, and monitor Siebel CRM Cloud Applications for unauthorized data access or modification.

Why it matters

Defenders of Siebel CRM Cloud Applications versions 22.3-26.9 should assess exposure and prioritize patching due to a medium-severity vulnerability allowing potential unauthorized data access or modification.

• Potential unauthorized data access or modification
• Need to verify Siebel CRM Cloud Applications version and patch status
• Possible compromise of Siebel CRM Cloud Applications
• Requirement to restrict access to the physical communication segment

Technical summary

The vulnerability in Siebel CRM Cloud Applications allows an unauthenticated attacker with access to the physical communication segment to compromise the application, potentially leading to unauthorized data access or modification. The CVSS 3.1 Base Score is 6.8, indicating a medium severity. The vulnerability affects versions 22.3-26.9, and defenders should assess exposure and prioritize patching. The vulnerability can be exploited through the physical communication segment, and defenders should verify the integrity of Siebel CRM Cloud Applications data.

Defensive priority

Medium

Recommended defensive actions

• Review and apply Oracle's security patches for Siebel CRM Cloud Applications versions 22.3-26.9
• Restrict access to the physical communication segment where Siebel CRM Cloud Applications executes
• Monitor Siebel CRM Cloud Applications for unauthorized data access or modification
• Verify the integrity of Siebel CRM Cloud Applications data
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and Oracle advisory provide details on the vulnerability, but its exploitation and impact require further verification. The vulnerability affects Siebel CRM Cloud Applications versions 22.3-26.9, and defenders should review and apply Oracle's security patches. The CVE record was published on 2026-10-20T21:25:33.339Z and has not been modified since then. The official CVE Program record and NIST NVD detail page provide additional information on the vulnerability.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.