CVE-2019-25598

HeidiSQL Portable 10.1.0.5464 Denial of Service via Buffer Overflow

Medium6.9Public exploitEPSS 0.14%

Published: 22 Mar 2026
Updated: 23 Mar 2026
Reserved: 22 Mar 2026
Assigned by: VulnCheck

Description

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.

Public exploit

A reference of the record is tagged as an exploit or proof of concept: anyone can try it against an unpatched system. CISA's SSVC rates its exploitation: a proof of concept is public.

ExploitDB-46749 (opens in a new tab)exploit

Timeline

2026
22 Mar 2026
22 Mar 2026
ID reserved
By VulnCheck
22 Mar 2026
22 Mar 2026
Published
23 Mar 20261 day later
23 Mar 2026· 1 day later
Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2019-25598, by who scored it
Scored by	CVSS	Score	Vector
VulnCheckCNA (assigner)	4.0	Medium6.9	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
VulnCheckCNA (assigner)	3.1	Medium6.2	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVDNVD · Deferred	4.0	Medium6.9	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS (exploitation in 30 days): 0.14% · top 96% of all CVEs (7 Nov 2026)
CISA SSVC: Exploitation: poc · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.9.

Weakness

CWE-787: Out-of-bounds Write (opens in a new tab)All about CWE-787 and its CVEs

Affected products

Heidisql · HeidiSQL Portable
- affected 10.1.0.5464

References (4)

ExploitDB-46749 (opens in a new tab)exploit
Official Product Homepage (opens in a new tab)product
Product Reference (opens in a new tab)product
VulnCheck Advisory: HeidiSQL Portable 10.1.0.5464 Denial of Service via Buffer Overflow (opens in a new tab)third-party-advisory

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

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Record last updated 23 Mar 2026, 16:02 UTC.