# CVE-2011-10015

## Summary

- **CVE ID:** CVE-2011-10015
- **Severity:** CRITICAL
- **CVSS Score:** 9.3 (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)
- **CWE:** CWE-121
- **Published:** Aug 13, 2025
- **Last Modified:** May 25, 2026

## Description

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.

## Affected Products

- Cytel Inc. — Studio (*)
- Cytel Inc. — Studio (0)
- Cytel Inc. — Cytel Studio (0)

## References

- [CNA](https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/fileformat/cytel_studio_cy3.rb)
- [CNA](https://www.exploit-db.com/exploits/17930)
- [CNA](https://www.exploit-db.com/exploits/18027)
- [CNA](http://aluigi.altervista.org/adv/cytel_1-adv.txt)
- [CNA](https://web.archive.org/web/20110708215826/http://www.cytel.com/Software/LogXact.aspx)
- [CNA](https://web.archive.org/web/20110708215830/http://www.cytel.com/Software/StatXact.aspx)
- [CNA](https://web.archive.org/web/20110301000000*/http://www.cytel.com/Software/StatXact.aspx)
- [CNA](https://www.vulncheck.com/advisories/cytel-studio-cy3-file-stack-buffer-overflow)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 3.47%
- **EPSS Percentile:** 87.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._