Denial of Service Vulnerability in RealTerm Serial Terminal Software
CVE-2019-25570

6.8MEDIUM

Key Information:

Vendor

Realterm

Status
Realterm: Serial Terminal
Vendor
CVE Published:
21 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2019-25570?

RealTerm Serial Terminal version 2.0.0.70 is susceptible to a denial of service vulnerability triggered by the Port input field. Local attackers can exploit this flaw by entering an excessively long string, specifically 1000 characters. When the open button is clicked, the application crashes, resulting in interrupted service and potential disruption to users reliant on the functionality of the software.

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Affected Version(s)

RealTerm: Serial Terminal 2.0.0.70

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-2019-25570 - Proof of Concept

References

https://www.exploit-db.com/exploits/46390
exploit
https://realterm.sourceforge.io/
product
https://sourceforge.net/projects/realterm/files/
product

CVSS V4

Score:
6.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Alejandra Sánchez
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