CVE-2026-46890
Published: 17 June 2026
Summary
CVE-2026-46890 is a critical-severity Improper Access Control (CWE-284) vulnerability in Oracle Siebel Apps - Marketing. Its CVSS base score is 9.8 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 38.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-37382
Vulnerability details
Vulnerability in the Siebel Apps - Marketing product of Oracle Siebel CRM (component: Marketing). Supported versions that are affected are 17.0-26.5. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Siebel Apps - Marketing. Successful attacks…
more
of this vulnerability can result in takeover of Siebel Apps - Marketing. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Unauthenticated remote HTTP exploit on public-facing Siebel CRM app directly matches T1190 for initial compromise/takeover.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Provides capability to review session content, directly detecting violations of access control.
Control assessments verify that access controls are implemented correctly and operating as intended, detecting improper access control before exploitation.
Identity providers centralize and enforce authentication mechanisms, reducing improper authentication.
Approving and monitoring nonlocal maintenance per policy enforces access control over remote diagnostic activities.
Architectures explicitly define requirements and mechanisms for access control to protect confidentiality, integrity, and availability.
The policy establishes consistent rules for granting, reviewing, and revoking access based on personnel status, tangibly limiting improper access control.
Risk assessment explicitly identifies threats from unauthorized access and drives decisions to implement or strengthen access control mechanisms.
Explicit training on access control mechanisms and their operation makes improper access control harder to introduce via misconfiguration.