What is the CVSS score of CVE-2019-25569?

CVE-2019-25569 has a CVSS 3.1 base score of 6.2 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.0%.

Which versions of Realterm are affected by CVE-2019-25569?

Organizations using RealTerm Serial Terminal 2.0.0.70 should be aware of moderate risk from CVE-2019-25569, a out-of-bounds write vulnerability rated CVSS 6.2.

Is there a public PoC exploit available for CVE-2019-25569?

Yes, a public proof-of-concept exploit is available for CVE-2019-25569. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2019-25569?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Realterm CVE-2019-25569

EUVD-2019-19886 MEDIUM

Out-of-bounds Write (CWE-787)

2026-03-21 VulnCheck

GHSA-qm4h-vmrq-638h

Memory Corruption Denial Of Service Buffer Overflow Realterm

6.2

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.2 MEDIUM

AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

PoC Detected

Mar 24, 2026 - 20:43 vuln.today

Public exploit code

EUVD ID Assigned

Mar 21, 2026 - 13:00 euvd

EUVD-2019-19886

Analysis Generated

Mar 21, 2026 - 13:00 vuln.today

CVE Published

Mar 21, 2026 - 12:47 nvd

MEDIUM 6.2

DescriptionCVE.org

RealTerm Serial Terminal 2.0.0.70 contains a stack-based buffer overflow vulnerability in the Echo Port field that allows local attackers to crash the application by triggering a structured exception handler (SEH) chain corruption. Attackers can craft a malicious input string with 268 bytes of padding followed by SEH overwrite values and paste it into the Port field to cause denial of service.

AnalysisAI

RealTerm Serial Terminal 2.0.0.70 contains a stack-based buffer overflow vulnerability in the Echo Port field that allows local attackers to crash the application by triggering a structured exception. Rated medium severity (CVSS 6.2), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Out-of-bounds Write (CWE-787), which allows attackers to write data beyond allocated buffer boundaries leading to code execution or crashes. RealTerm Serial Terminal 2.0.0.70 contains a stack-based buffer overflow vulnerability in the Echo Port field that allows local attackers to crash the application by triggering a structured exception handler (SEH) chain corruption. Attackers can craft a malicious input string with 268 bytes of padding followed by SEH overwrite values and paste it into the Port field to cause denial of service. Affected products include: Realterm.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate write boundaries, use memory-safe languages, enable compiler protections (ASLR, stack canaries).