Buffer overflow in Heidisql Portable
CVE-2019-25598
HeidiSQL Portable 10.1.0.5464 contains a denial of service vulnerability that allows local attackers to crash the application by supplying an excessively long string in the password field. Attackers can paste a buffer overflow payload into the password input during Microsoft SQL Server login to trigger an application crash.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.001 (2.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 2.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
- Heidisql Portable — versions 10.1.0.5464
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/46749 (exploit)
- www.heidisql.com/ (product)
- www.heidisql.com/downloads/releases/HeidiSQL_10.1_64_Portable.zip (product)
- www.vulncheck.com/advisories/heidisql-portable-denial-of-service-via-buffer-ove… (third-party-advisory)
Frequently asked questions
- What is CVE-2019-25598?
- CVE-2019-25598 is a medium-severity vulnerability in Heidisql Portable, classified under Out-of-bounds Write. CVSS score: 6.2/10. Published 2026-03-22.
- How severe is CVE-2019-25598?
- Medium severity. CVSS v3 base score is 6.2 out of 10.