What’s Vulnerable › Vulnerabilities

CVE-2019-25569: RealTerm Serial Terminal 2.0.0.70 SEH Overflow Crash

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-21 · updated 2026-06-17
• Weakness: CWE-787

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.

Affected products

• RealTerm: Serial Terminal: 2.0.0.70

References

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

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