Cytel Studio version 9.0 and earlier is vulnerable to a stack-based buffer overflow triggered by parsing a malformed .CY3 file. The vulnerability occurs when the application copies user-controlled strings into a fixed-size stack buffer (256 bytes) without proper bounds checking. Exploitation allows arbitrary code execution when the crafted file is opened.
https://www.vulncheck.com/advisories/cytel-studio-cy3-file-stack-buffer-overflow
https://www.exploit-db.com/exploits/18027
https://www.exploit-db.com/exploits/17930
https://web.archive.org/web/20110708215830/http://www.cytel.com/Software/StatXact.aspx
https://web.archive.org/web/20110708215826/http://www.cytel.com/Software/LogXact.aspx
https://web.archive.org/web/20110301000000*/http://www.cytel.com/Software/StatXact.aspx
Published: 2025-08-13
Updated: 2026-04-15
Base Score: 6.8
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P
Severity: Medium
Base Score: 7.8
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Severity: High
Base Score: 9.3
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Severity: Critical
EPSS: 0.00022