What is CVE-2019-25569?

CVE-2019-25569 is a medium-severity vulnerability in Realterm Realterm: Serial Terminal, classified under Out-of-bounds Write. CVSS score: 6.2/10. Published 2026-03-21.

How severe is CVE-2019-25569?

Medium severity. CVSS v3 base score is 6.2 out of 10.

Buffer overflow in Realterm Realterm: Serial Terminal

CVE-2019-25569

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. Attacke…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (5.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Realterm Realterm: Serial Terminal — versions 2.0.0.70

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

ExploitDB-46391 (exploit)
Official Product Homepage (product)
Product Reference (product)
VulnCheck Advisory: RealTerm Serial Terminal 2.0.0.70 SEH Overflow Crash (third-party-advisory)

Frequently asked questions

What is CVE-2019-25569?: CVE-2019-25569 is a medium-severity vulnerability in Realterm Realterm: Serial Terminal, classified under Out-of-bounds Write. CVSS score: 6.2/10. Published 2026-03-21.
How severe is CVE-2019-25569?: Medium severity. CVSS v3 base score is 6.2 out of 10.