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CVE-2026-61318 – Unauthenticated RCE / Complete System Compromise – Oracle Siebel CRM Cloud Applicat

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Summary

CVE-2026-61318 is a critical vulnerability in the Siebel Cloud Manager component of Oracle Siebel CRM Cloud Applications. It allows an unauthenticated, remote attacker with network access via HTTP to compromise and fully take over affected Siebel CRM Cloud Applications instances. Oracle rates the issue Critical, with a CVSS v3.1 base score of 9.8.

Technical details

  • Root cause: an easily exploitable flaw in the Siebel Cloud Manager component of Siebel CRM Cloud Applications, as documented by Oracle.
  • Trigger conditions: no authentication or user interaction is required; the attack requires only network access to the application over HTTP.
  • Attack vector: network (remote, over HTTP), with low attack complexity and no privileges required.
  • Impact: successful exploitation can result in complete takeover of Siebel CRM Cloud Applications, with high impact to confidentiality, integrity, and availability.

Affected software

  • Oracle Siebel CRM Cloud Applications, Siebel Cloud Manager component: supported versions 22.3 through 26.6 (inclusive).

Severity

  • CVSS v3.1 Base Score: 9.8 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Apply the fix provided in Oracle’s August 2026 Critical Patch Update/Security Alert (cspuaug2026) for all Siebel CRM Cloud Applications deployments running versions 22.3 through 26.6.
  • If immediate patching is not possible: restrict network access to Siebel CRM Cloud Applications management/HTTP interfaces to trusted networks only, and monitor for anomalous unauthenticated requests until the patch can be applied.

How IONIX identifies potentially affected assets

IONIX matches the following signals against data already collected when it crawled the asset; identifying the technology sends no request beyond that crawl.

  • Page title: Oracle - Siebel Customer Relationship Management

References

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How IONIX’s External Exposure Management Platform Detects and Validates
Zero-Days to Shrink MTTR

1

Map your entire attack surface (continously)

IONIX uses multi-factor discovery methods, including DNS analysis, certificate mapping, metadata inspection, and more, to automatically map every internet-facing asset across your environment. This includes cloud instances, third-party platforms, shadow IT, and even forgotten infrastructure that traditional tools miss.

2

Monitor for new CVEs

Dozens of threat intel feeds using agentic technology are continuously analyzed to detect the appearance of proof-of-concept code, exploit kits, and indicators of active targeting. IONIX goes further by applying AI to proactively evaluate whether emerging vulnerabilities are likely to be exploited, even before PoCs go public.

3

Identify Potential External Exposures

Not all CVEs matter. IONIX filters vulnerabilities by asking attacker-centric questions: Can it be reached from the internet? Does it require authentication? Is it being exploited in the wild? This dramatically reduces noise and focuses teams on threats that can actually be weaponized.

4

Create Safe, Scalable Exploit Validations

IONIX transforms real-world PoCs into safe, non-intrusive test payloads that can be run in production environments without disruption. These simulations are precisely targeted to the systems that are vulnerable, ensuring rapid validation without unnecessary load.

5

Execute Exploit Validations

By combining context about software stack, versioning, exposure status, and reachability, IONIX ensures that only the right payloads are executed against the right assets, maximizing efficiency and minimizing risk.

6

Drive Fast and Actionable Remediation

Results are routed through integrations with ticketing, SOAR, and SIEM tools. Issues are written in plain language, bundled into remediation clusters, and prioritized based on asset criticality, exploitability, and blast radius. This shortens mean time to remediation (MTTR) and empowers teams to act with confidence.

Are you exposed?

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  • Mapping of all Assets with this Technology
  • Identification of potentially exposed assets to this CVE
  • Confirmation of verified exploitable assets
Get Exposure Report
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