Buffer Overflow Vulnerability in RealTerm Serial Terminal by SourceForge
CVE-2019-25679

8.5HIGH

Key Information:

Vendor

Realterm

Status
Realterm: Serial Terminal
Vendor
CVE Published:
5 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2019-25679?

RealTerm Serial Terminal version 2.0.0.70 is susceptible to a structured exception handling (SEH) buffer overflow vulnerability located in the Echo Port tab. This flaw allows local attackers to exploit the system by supplying specially crafted inputs that can trigger the execution of arbitrary code. By utilizing a carefully constructed buffer overflow payload, including a POP POP RET gadget chain and shellcode, an attacker may gain unauthorized access to the system's functionality through the Port field. This vulnerability necessitates immediate attention to protect against potential exploitation.

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Affected Version(s)

RealTerm: Serial Terminal 1.11.2

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-2019-25679 - Proof of Concept

References

https://www.exploit-db.com/exploits/46441
exploit
https://realterm.sourceforge.io/
product
https://sourceforge.net/projects/realterm/files/
product

CVSS V4

Score:
8.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
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

Matteo Malvica
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