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Vulnerability record · CVE-2019-25570 · published 21 March 2026

CVE-2019-25570: Crun realterm vulnerability

Crun · Realterm

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.

6.8 CVSS 4.0 Medium EPSS 0.22% · top 88.9% CWE-1260 · CWE-1260
6.8CVSS 4.0 base score
0.22%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 1 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://realterm.sourceforge.io/ Product
https://sourceforge.net/projects/realterm/files/ Product
https://www.exploit-db.com/exploits/46390 ExploitThird Party AdvisoryVDB Entry
https://www.vulncheck.com/advisories/realterm-serial-terminal-denial-of-service-via-port-field Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.5CVE-2019-25679Crun realterm out-of-bounds write vulnerabilityRealTerm Serial Terminal 2.0.0.70 contains a structured exception handling (SEH) buffer overflow vulnerability in the Echo Port tab that allows local…EPSS 0.31%6.9CVE-2019-25569Crun realterm out-of-bounds write vulnerabilityRealTerm Serial Terminal 2.0.0.70 contains a stack-based buffer overflow vulnerability in the Echo Port field that allows local attackers to crash th…EPSS 0.19%

Source: NIST National Vulnerability Database (record CVE-2019-25570), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.