CVE-2019-25569

MEDIUM 6.2

RealTerm Serial Terminal 2.0.0.70 SEH Overflow Crash

CVSS Score

6.2

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-787
Vendor	realterm
Product	realterm: serial terminal
Published	Mar 21, 2026
Last Updated	Mar 23, 2026

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CVSS v3 Breakdown

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

Realterm / RealTerm: Serial Terminal

2.0.0.70

References

NVD ↗ CVE.org ↗ EPSS Data ↗

exploit-db.com: https://www.exploit-db.com/exploits/46391 realterm.sourceforge.io: https://realterm.sourceforge.io/ sourceforge.net: https://sourceforge.net/projects/realterm/files/ vulncheck.com: https://www.vulncheck.com/advisories/realterm-serial-terminal-seh-overflow-crash

Credits

Alejandra Sánchez