Denial of Service in HeidiSQL Portable 10.1.0.5464 by Supply of Long Password Strings
CVE-2019-25598

6.9MEDIUM

Key Information:

Vendor

Heidisql

Status
Heidisql Portable
Vendor
CVE Published:
22 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2019-25598?

HeidiSQL Portable version 10.1.0.5464 contains a vulnerability that allows a local attacker to cause a denial of service by entering an excessively long string in the password field during login attempts to Microsoft SQL Server. When a buffer overflow payload is inserted, it results in an application crash, thereby disrupting service for users.

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Affected Version(s)

HeidiSQL Portable 10.1.0.5464

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2019-25598 - Proof of Concept

References

https://www.exploit-db.com/exploits/46749
exploit
https://www.heidisql.com/
product
https://www.heidisql.com/downloads/releases/HeidiSQL_10.1...
product

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Victor Mondragón
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