Read the docs
TI-2026-77476 Aliases CVE-2026-91420GHSA-vw7f-3wgw-7vx7

Improper access control in Oracle Siebel CRM Deployment

Priority LOW 28CWE-284Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-284.

Summary

Oracle Siebel CRM Deployment versions 17.0 through 26.9 are affected by an improper access control flaw in the Server Infrastructure component (CWE-284). A low privileged attacker with network access over HTTP can compromise the product. Successful attacks can allow unauthorized creation, deletion or modification of critical data, with a CVSS 3.1 base score of 6.5 for integrity impact.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

Vulnerability in the Siebel CRM Deployment product of Oracle Siebel CRM (component: Server Infrastructure). Supported versions that are affected are 17.0-26.9. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Siebel CRM Deployment. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Siebel CRM Deployment accessible data. CVSS 3.1 Base Score 6.5 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00234 14th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OracleSiebel CRM Deployment17.0 – 26.9—No fix listedCNA
  • Siebel CRM Deployment VendorOracle Affected 17.0 – 26.9 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:oracle:siebel_crm:*:*:*:*:*:*:*:*17.0 – 26.9VulnerableOracle
  • cpe:2.3:a:oracle:siebel_crm:*:*:*:*:*:*:*:* Versions 17.0 – 26.9 Vulnerable ·Oracle

Remediation

The sources list no fixed version for Siebel CRM Deployment.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Oracle Siebel CRM Deployment — oracle.com/security-alerts/cpuoct2026.html

    35 records Highest priority Priority MEDIUM 3 MEDIUM, 32 LOW

    Other records, highest priority first

    • TI-2026-77773 Improper access control in Oracle Siebel CRM Deployment exposes dataPriority MEDIUM 42
    • TI-2026-77497 Oracle Siebel CRM Deployment Server Infrastructure flaw enables takeoverPriority MEDIUM 40
    • TI-2026-77492 Improper access control in Oracle Siebel CRM DeploymentPriority MEDIUM 40
    Show all 35 records → Advisory →

Timeline

  1. 2026-10-21 Threatist record created from CVE-2026-91420
  2. 2026-10-21 Alias added: GHSA-vw7f-3wgw-7vx7
  3. 2026-10-22 Priority changed: MEDIUM → LOW
  4. 2026-10-24 Weakness changed · CISA ADP
  5. 2026-10-24 CISA SSVC decision points changed

References

Advisory 1

  • TI-2026-44706 Improper access control in Oracle Siebel CRM Integration CVSS 3.1CRITICAL 9.8
  • TI-2026-44699 Improper access control in Oracle Siebel CRM Administration CVSS 3.1CRITICAL 9.8
  • TI-2026-44566 Improper access control in Oracle Siebel CRM Cloud Applications CVSS 3.1CRITICAL 9.9
  • TI-2026-43962 Improper access control in Oracle Siebel CRM Cloud Applications CVSS 3.1CRITICAL 9.8
  • TI-2026-34639 Missing authentication in Oracle Siebel CRM Development CVSS 3.1CRITICAL 9.8
  • TI-2026-34525 Improper access control in Oracle Siebel CRM Cloud Applications CVSS 3.1CRITICAL 9.8
See all 244 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences