Is CVE-2019-25569 actively exploited?

No active exploitation of CVE-2019-25569 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2019-25569 be exploited remotely?

No. CVE-2019-25569 requires local access to exploit.

What is the CVSS score of CVE-2019-25569?

CVE-2019-25569 has a CVSS score of 5.5 (MEDIUM).

HOME VULNERABILITIESCVE-2019-25569

MEDIUM

CVE-2019-25569

CWE-787Published: March 21, 2026· Updated: Mar 24, 2026

5.5

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:1.5th

Official Description

RealTerm Serial Terminal 2.0.0.70 contains a stack-based buffer overflow vulnerability in the Echo Port field that allows local attackers to crash the application by triggering a structured exception handler (SEH) chain corruption. Attackers can craft a malicious input string with 268 bytes of padding followed by SEH overwrite values and paste it into the Port field to cause denial of service.

NVD Source

Technical Analysis

CVE-2019-25569 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.