Oracle Siebel CRM Development: Unauthenticated remote compromise via Siebel Approval Manager
Summary
Oracle Siebel CRM Development versions 17.0 to 26.9 contain a vulnerability in the Siebel Approval Manager component. An unauthenticated attacker with network access via HTTP can compromise the product, potentially taking it over, if a user interacts with a crafted request. The CNA scores it CVSS 8.8, while VulDB scores it 6.3.
Affected
- Oracle Siebel CRM Development, versions 17.0 to 26.9 (component: Siebel Approval Manager)
Fixed in
- Unknown. Check the Oracle October 2026 Critical Patch Update advisory for the fixed release.
Workaround
- Unknown. No vendor-specific workaround found.
- Until patched, restrict HTTP access to Siebel endpoints to trusted internal networks.
- Remove Development instances from internet exposure.
Exploitation
- No known exploitation in the wild; not listed in CISA KEV.
- No public proof of concept found.
Our recommendation
- Check whether any Siebel CRM Development instance exists in your environment.
- If reachable from the internet or untrusted segments, treat as high priority and restrict access immediately.
- Apply the Oracle October 2026 CPU fix for versions 17.0 to 26.9 as soon as the exact release is confirmed.
- Monitor HTTP access logs for unusual requests to Siebel endpoints.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Oracle Security Alert October 2026 CPU www.oracle.com
- VulDB entry CVE-2026-101495 vuldb.com
- Strix CVE-2026-101495 (CNA data) www.strix.ai
- NVD record via Vulners mirror vulners.com
- Positive Technologies PT-2026-119183 vulners.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 31 Oct 2026, 15:31.
Original description (NVD)
Vulnerability in the Siebel CRM Development product of Oracle Siebel CRM (component: Siebel Approval Manager). Supported versions that are affected are 17.0-26.9. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Siebel CRM Development. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in takeover of Siebel CRM Development. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
Affected? We can help.
We check whether your systems are affected, install updates and close the gap – continuously with the System Health Checker if you wish.