CVE-2019-25569 - CVE House
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Status published Medium CVE-2019-25569

RealTerm Serial Terminal 2.0.0.70 SEH Overflow Crash

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Alejandra Sánchez

Affected Vendor

Affected Software

RealTerm: Serial Terminal
Vulnerable Versions:
2.0.0.70

Timeline

Official Publish: March 21st, 2026
Last Modified: March 23rd, 2026
Added to House: July 20th, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)