What is the CVSS score of CVE-2026-46889?

CVE-2026-46889 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.5%.

Which versions of Oracle Siebel CRM are affected by CVE-2026-46889?

Oracle Siebel Apps-Marketing (versions 17.0-26.5) is vulnerable to unauthenticated remote takeover via HTTP, allowing any internet-based attacker to fully compromise customer data, marketing…

How to fix or mitigate CVE-2026-46889?

Within 24 hours: Inventory all Oracle Siebel Marketing instances (versions 17.0-26.5); document internet exposure and restrict external HTTP/HTTPS access via firewall rules if operationally feasible. Within 7 days: Implement network segmentation isolating Siebel systems to internal-only access; deploy Web Application Firewall (WAF) with request filtering; enable comprehensive HTTP request logging and alerting. Within 30 days: Contact Oracle for patch timeline and affected version upgrade path; plan migration or upgrade strategy; perform forensic log review for exploitation indicators dating back 30 days prior to patch release.

Oracle Siebel CRM CVE-2026-46889

EUVD-2026-37381 CRITICAL

Improper Access Control (CWE-284)

2026-06-16 oracle

Oracle Siebel Apps Marketing Authentication Bypass

9.8

CVSS 3.1 · Vendor: oracle

Severity by source

Vendor (oracle) PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

vuln.today AI

9.8 CRITICAL

Oracle describes easy unauthenticated HTTP exploitation resulting in full takeover of the Marketing component, with no scope change beyond that module, justifying full CIA:H.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Jun 16, 2026 - 22:27 vuln.today

DescriptionCVE.org

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 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).

AnalysisAI

Unauthenticated remote takeover of Oracle Siebel Apps - Marketing (versions 17.0 through 26.5) is possible via HTTP, allowing attackers to fully compromise confidentiality, integrity, and availability of the marketing component. Oracle's CVSS 3.1 base score of 9.8 reflects trivial network exploitability with no authentication or user interaction, and no public exploit identified at time of analysis. The flaw was disclosed in Oracle's Critical Patch Update cycle and tracked in ENISA's EUVD as EUVD-2026-37381.

Technical ContextAI

Siebel Apps - Marketing is the marketing automation module of Oracle's Siebel CRM suite, used by enterprises for campaign management, segmentation, and customer outreach. The affected CPE (cpe:2.3:a:oracle_corporation:siebel_apps_-_marketing) covers all versions from 17.0 (the start of Siebel Innovation Pack 17) through 26.5. Oracle did not assign a CWE and provided no technical detail beyond the CVSS vector, but the AV:N/AC:L/PR:N/UI:N/C:H/I:H/A:H profile combined with HTTP as the attack channel is typical of unauthenticated injection, deserialization, or authentication-bypass classes in Java/web-tier components of Siebel.

RemediationAI

Apply the patch from Oracle's June 2026 Critical Patch Update as documented at https://www.oracle.com/security-alerts/cspujun2026.html; Patch available per vendor advisory but the exact fixed Siebel Innovation Pack or quick-fix bundle number is not enumerated in the input and should be retrieved directly from the CPU matrix for your installed version. As compensating controls until patching, restrict HTTP access to the Siebel Marketing component to known administrative and campaign-operator source networks via WAF or network ACLs, disable any externally exposed Marketing servlets or endpoints that are not in active use, and increase web-tier logging to capture anomalous POST bodies and authentication failures - note that restricting network access will block legitimate remote marketing users and external integrations such as email service providers calling back into Siebel.