Is CVE-2019-25679 actively exploited?

No active exploitation of CVE-2019-25679 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2019-25679 be exploited remotely?

No. CVE-2019-25679 requires local access to exploit.

What is the CVSS score of CVE-2019-25679?

CVE-2019-25679 has a CVSS score of 7.8 (HIGH).

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HIGH

CVE-2019-25679

CWE-787Published: April 5, 2026· Updated: Apr 7, 2026

7.8

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:2.3th

Official Description

RealTerm Serial Terminal 2.0.0.70 contains a structured exception handling (SEH) buffer overflow vulnerability in the Echo Port tab that allows local attackers to execute arbitrary code by supplying a malicious payload. Attackers can craft a buffer overflow payload with a POP POP RET gadget chain and shellcode that triggers code execution when pasted into the Port field and the Change button is clicked.

NVD Source

Technical Analysis

CVE-2019-25679 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

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