Application crash via overlong Port field
Published Mar 21, 2026 · Updated Mar 21, 2026
Denial of service in RealTerm Serial Terminal 2.0.0.70 allows local attackers to crash the application via an overlong Port value. The Port input accepts a 1,000-character string, and the Open action processes it without enforcing a safe input-length limit. Exploitation requires interactive access to paste the string and select Open; the demonstrated consequence is termination of the running application.
Summary
What happened
Denial of service in RealTerm Serial Terminal 2.0.0.70 allows local attackers to crash the application via an overlong Port value. The Port input accepts a 1,000-character string, and the Open action processes it without enforcing a safe input-length limit. Exploitation requires interactive access to paste the string and select Open; the demonstrated consequence is termination of the running application.
The record
- CVE
- CVE-2019-25570
- Published
- Mar 21, 2026
- Updated
- Mar 21, 2026
- Vendor
- Realterm
- Product
- Realterm: Serial Terminal
- Classifications
- CWE-1260, T1499
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 21, 2026CVE publishedPublication date reported by the CVE source.
- Mar 21, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=2.0.0.70
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Realterm Serial Terminal 2.0.0.70 - Denial of Serviceproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo