How severe is CVE-2019-25569?

CVE-2019-25569 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2019-25569 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-25569?

CVE-2019-25569 affects Crun Realterm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-25569?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2019-25569 have an EU (EUVD) identifier?

Yes. CVE-2019-25569 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-19886.

When was CVE-2019-25569 published?

CVE-2019-25569 was published on 2026-03-21 and last updated on 2026-06-17.

CVE-2019-25569

CVE-2019-25569 is a medium-severity vulnerability in Crun Realterm with a CVSS 3.x base score of 6.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: Medium (CVSS 3.x base score 6.2)
CVSS v4: 6.9
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2019-19886
Weakness: CWE-787
Affected product: Crun Realterm
Published: 2026-03-21
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2019-25569?: 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.
How severe is CVE-2019-25569?: CVE-2019-25569 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2019-25569 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-25569?: CVE-2019-25569 affects Crun Realterm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-25569?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2019-25569 have an EU (EUVD) identifier?: Yes. CVE-2019-25569 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-19886.
When was CVE-2019-25569 published?: CVE-2019-25569 was published on 2026-03-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:crun:realterm:2.0.0.70:*:*:*:*:*:*:*

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CVE-2019-25679 — High (CVSS 7.8): RealTerm Serial Terminal 2.0.0.70 contains a structured exception handling (SEH) buffer overflow vulnerability in the…
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