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Probes hit Oracle E-Business Suite RCE flaw days after patch
The Hacker News reports Defused Cyber said its Oracle E-Business Suite decoys recorded exploratory exploits on Oct. 27 against CVE-2026-101767, a critical unauthenticated SQL injection patched last week that Horizon3.ai says can chain to remote code execution.
- New headline Was: “Researchers say scanners are probing a patched Oracle EBS flaw”
- Our desk updated its story
- The Hacker News is now reporting this
Threat intelligence firm Defused Cyber said its Oracle E-Business Suite decoys recorded exploratory exploits on the morning of Oct. 27 against CVE-2026-101767, a critical flaw Oracle patched last week, The Hacker News reported1.
The vulnerability is listed with a CVSS score of 9.8 in the Oracle Application Object Library of E-Business Suite and was included in Oracle's October Critical Patch Update1. Horizon3.ai researchers Brandon Peterson, Jimi Sebree and Noah King were credited with reporting it to Oracle on July 24, 20261.
Horizon3.ai described the issue as unauthenticated SQL injection in EBS's Thin Client Framework servlet that can be chained to remote code execution1. The company said an attacker with network access to the TCF servlet can run SQL as the APPS database user, then operating-system commands as the EBS application account1.
The Hacker News account said a crafted request to /OA_HTML/AppsTCFServer can enable that chain1. Successful exploitation can let an attacker read or change application data available to APPS and run commands on the application host, Horizon3.ai said, with affected data possibly including financial, payroll, HR and procurement records depending on the deployment1.
Internet-facing EBS systems present the highest risk, the researchers said, though internal systems can be reached if an attacker can hit the servlet from a compromised host or another network segment1.
Horizon3.ai advised applying the patch promptly1. If that is not immediately possible, it listed removing /OA_HTML/AppsTCFServer, associated with oracle.apps.fnd.tcf.SocketServer, from the EBS URL firewall allowlist; restricting web-tier access to trusted networks; and monitoring the application host and database1.
Indicators of compromise it shared included unauthenticated POST requests to that servlet that instantiate the Gantt data-server class, SQL reconnaissance after unauthenticated web requests, unexpected files in $APPLPTMP, and the oracle account spawning /bin/sh via the Concurrent Manager1.
The Hacker News noted that two other critical EBS flaws in the past year, CVE-2025-61882 and CVE-2026-46817, also rated 9.8, came under active exploitation, with the former attributed to the Cl0p ransomware and extortion group1.
This filing rests on a single trade-press report summarizing Defused Cyber and Horizon3.ai1. It does not independently confirm exploitation of production EBS systems, name the probing actors, or quote Oracle beyond the existence of the October patch1.
