CVE-2019-25570

low-risk
Published 2026-03-21

RealTerm Serial Terminal 2.0.0.70 contains a denial of service vulnerability that allows local attackers to crash the application by supplying an excessively long string in the Port field. Attackers can paste a buffer of 1000 characters into the Port input field and click the open button to trigger a crash.

Do I need to act?

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0.03% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Realterm

Affected Vendors

Crun

References (4)

Product https://realterm.sourceforge.io/
Product https://sourceforge.net/projects/realterm/files/
Exploit https://www.exploit-db.com/exploits/46390
Third Party Advisory https://www.vulncheck.com/advisories/realterm-serial-terminal-denial-of-service-...
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal