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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.

PUBLISHED Reserved 2026-03-21 | Published 2026-03-21 | Updated 2026-03-23 | Assigner VulnCheck




MEDIUM: 6.9CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
MEDIUM: 6.2CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

Out-of-bounds Write

Product status

2.0.0.70
affected

Credits

Alejandra Sánchez finder

References

www.exploit-db.com/exploits/46391 (ExploitDB-46391) exploit

realterm.sourceforge.io/ (Official Product Homepage) product

sourceforge.net/projects/realterm/files/ (Product Reference) product

www.vulncheck.com/...term-serial-terminal-seh-overflow-crash (VulnCheck Advisory: RealTerm Serial Terminal 2.0.0.70 SEH Overflow Crash) third-party-advisory

cve.org (CVE-2019-25569)

nvd.nist.gov (CVE-2019-25569)

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