Oracle Mobile Field Service: Improper access control allows unauthenticated attacks
Summary
Oracle Mobile Field Service, a module of Oracle E-Business Suite (component Internal Operations), contains an improper access control flaw (CWE-284). An unauthenticated attacker with network access via HTTP can exploit it without user interaction. Successful attacks can lead to unauthorized access to critical data or full access to all data accessible through the module, and can also cause a hang or repeatable crash (denial of service).
Affected
- Oracle Mobile Field Service (Oracle E-Business Suite, component Internal Operations), supported versions 12.2.3 to 12.2.15
Fixed in
- Fixed in the Oracle October 2026 Critical Patch Update (CPU), released 20 October 2026.
- Specific EBS patch numbers: Unknown. See the Oracle advisory and MOS document KA1818 for your exact EBS release.
Workaround
- No vendor workaround found.
- Until patched, restrict network access to the EBS and Mobile Field Service web tier (for example VPN, reverse proxy allowlist or WAF rules for the affected paths).
Exploitation
- No evidence of exploitation in the wild found.
- No public proof of concept found.
- Not listed in CISA KEV at the time of research.
- CISA SSVC: exploitation none, automatable yes, technical impact partial.
Our recommendation
- Confirm whether Mobile Field Service is in use and whether its endpoints are reachable from the internet.
- Restrict access to the affected web paths now.
- Test and apply the October 2026 EBS CPU per the Oracle guidance (MOS KA923 and KA1818).
- Verify the CVSS score (9.1 in the CNA record; one listing shows 9.8) against the Oracle advisory.
- Monitor for vendor updates or a KEV listing.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Oracle Security Alert: October 2026 Critical Patch Update www.oracle.com
- Oracle E-Business Suite Technology Blog: October 2026 CPU blogs.oracle.com
- Vulners: CVE-2026-101634 vulners.com
- Strix: CVE-2026-101634 www.strix.ai
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, 05:48.
Original description (NVD)
Vulnerability in the Oracle Mobile Field Service product of Oracle E-Business Suite (component: Internal Operations). Supported versions that are affected are 12.2.3-12.2.15. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Mobile Field Service. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Mobile Field Service accessible data and unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Mobile Field Service. CVSS 3.1 Base Score 9.1 (Confidentiality and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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.
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