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.

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Realterm RealTerm: Serial Terminal affected
Version Status Constraints
2.0.0.70 affected
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Subscriptions

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Tracking

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://realterm.sourceforge.io/ cve-icon cve-icon
https://sourceforge.net/projects/realterm/files/ cve-icon cve-icon
https://www.exploit-db.com/exploits/46390 cve-icon cve-icon
https://www.vulncheck.com/advisories/realterm-serial-terminal-denial-of-service-via-port-field cve-icon cve-icon
History

Sat, 21 Mar 2026 13:00:00 +0000

Type Values Removed Values Added
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.
Title RealTerm Serial Terminal 2.0.0.70 Denial of Service via Port Field
Weaknesses CWE-1260
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 6.8, 'vector': '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'}
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-03-21T12:47:10.060Z

Reserved: 2026-03-21T12:36:58.050Z

Link: CVE-2019-25570

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-03-21T13:16:20.833

Modified: 2026-03-21T13:16:20.833

Link: CVE-2019-25570

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses