ZDI-26-637: Oracle Outside In Technology GEM File Parsing Integer Overflow Remote Code Execution Vulnerability
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Oracle Outside In Technology. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the parsing of GEM files. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before allocating a buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.
Oracle has issued an update to correct this vulnerability. More details can be found at:
2026-04-08 - Vulnerability reported to vendor
2026-09-09 - Coordinated public release of advisory
2026-09-09 - Advisory Updated
Mat Powell of TrendAI Zero Day Initiative
The full story
This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.
