What’s Vulnerable › Vulnerabilities

CVE-2019-25679: RealTerm Serial Terminal 2.0.0.70 Buffer Overflow SEH

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-05 · updated 2026-07-24
• Weakness: CWE-787

Description

RealTerm Serial Terminal 2.0.0.70 contains a structured exception handling (SEH) buffer overflow vulnerability in the Echo Port tab that allows local attackers to execute arbitrary code by supplying a malicious payload. Attackers can craft a buffer overflow payload with a POP POP RET gadget chain and shellcode that triggers code execution when pasted into the Port field and the Change button is clicked.

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/46441
• https://www.vulncheck.com/advisories/realterm-serial-terminal-buffer-overflow-seh

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