Buffer overflow in Tuneclone
CVE-2019-25603
TuneClone 2.20 contains a structured exception handler (SEH) buffer overflow vulnerability that allows local attackers to execute arbitrary code by supplying a malicious license code string. Attackers can craft a payload with a controlled buffer, NSEH jump instruction, and SEH handler address pointing to a ROP gadget, then paste it into the license code field to trigger code execution and establish a bind shell.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (7.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Tuneclone — versions 2.20
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/47012 (exploit)
- www.tuneclone.com/ (product)
- www.tuneclone.com/tuneclone_setup.exe (product)
- www.vulncheck.com/advisories/tuneclone-structured-exception-handler-buffer-over… (third-party-advisory)
Frequently asked questions
- What is CVE-2019-25603?
- CVE-2019-25603 is a high-severity vulnerability in Tuneclone, classified under Out-of-bounds Write. CVSS score: 8.4/10. Published 2026-03-22.
- How severe is CVE-2019-25603?
- High severity. CVSS v3 base score is 8.4 out of 10.