CVE-2019-25627
FlexHEX 2.71 Local Buffer Overflow via SEH Unicode
- State
- Published
- Severity
- 8.6 High
- Published
- Mar 24, 2026
- Updated
- Oct 1, 2026
- Reserved
- Mar 24, 2026
Description
FlexHEX 2.71 contains a local buffer overflow vulnerability in the Stream Name field that allows local attackers to execute arbitrary code by triggering a structured exception handler (SEH) overflow. Attackers can craft a malicious text file with carefully aligned shellcode and SEH chain pointers, paste the contents into the Stream Name dialog, and execute arbitrary commands like calc.exe when the exception handler is triggered.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.6 High | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 8.4 High | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-434 Unrestricted Upload of File with Dangerous Type
Affected Products
| Product | Versions |
|---|---|
FlexHEXFlexhex |
|
References
- ExploitDB-46665exploit
- Official Product Homepageproduct
- Product Referenceproduct
- VulnCheck Advisory: FlexHEX 2.71 Local Buffer Overflow via SEH Unicodethird-party-advisory
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.