How severe is CVE-2019-25679?

CVE-2019-25679 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-25679 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-25679?

CVE-2019-25679 affects Crun Realterm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-25679?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2019-25679 have an EU (EUVD) identifier?

Yes. CVE-2019-25679 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-20093.

When was CVE-2019-25679 published?

CVE-2019-25679 was published on 2026-04-05 and last updated on 2026-06-17.

CVE-2019-25679

CVE-2019-25679 is a high-severity vulnerability in Crun Realterm with a CVSS 3.x base score of 7.8. 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: High (CVSS 3.x base score 7.8)
CVSS v4: 8.5
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2019-20093
Weakness: CWE-787
Affected product: Crun Realterm
Published: 2026-04-05
Last modified: 2026-06-17

Description

RealTerm Serial Terminal 2.0.0.70 contains a structured exception handling (SEH) buffer overflow vulnerability in the Echo Port tab that allows local attackers to execute arbitrary code by supplying a malicious payload. Attackers can craft a buffer overflow payload with a POP POP RET gadget chain and shellcode that triggers code execution when pasted into the Port field and the Change button is clicked.

Frequently asked questions

What is CVE-2019-25679?: RealTerm Serial Terminal 2.0.0.70 contains a structured exception handling (SEH) buffer overflow vulnerability in the Echo Port tab that allows local attackers to execute arbitrary code by supplying a malicious payload. Attackers can craft a buffer overflow payload with a POP POP RET gadget chain and shellcode that triggers code execution when pasted into the Port field and the Change button is clicked.
How severe is CVE-2019-25679?: CVE-2019-25679 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-25679 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-25679?: CVE-2019-25679 affects Crun Realterm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-25679?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2019-25679 have an EU (EUVD) identifier?: Yes. CVE-2019-25679 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-20093.
When was CVE-2019-25679 published?: CVE-2019-25679 was published on 2026-04-05 and last updated on 2026-06-17.

References

Affected products (1)

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

More vulnerabilities in Crun Realterm

CVE-2019-25569 — Medium (CVSS 6.2): RealTerm Serial Terminal 2.0.0.70 contains a stack-based buffer overflow vulnerability in the Echo Port field that…
CVE-2019-25570 — Medium (CVSS 5.5): RealTerm Serial Terminal 2.0.0.70 contains a denial of service vulnerability that allows local attackers to crash the…

All CVEs affecting Crun Realterm →

Other CWE-787 (Out-of-bounds Write) vulnerabilities

CVE-2026-42369 — Critical (CVSS 10.0): GV-VMS V20 is a Video Monitoring Software used to gather the feeds of many surveillance cameras and manage other…
CVE-2026-4746 — Critical (CVSS 10.0): Out-of-bounds Write vulnerability in timeplus-io proton (base/poco/Foundation/src‎ modules). This vulnerability is…
CVE-2025-43300 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS…
CVE-2025-24201 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved checks to prevent unauthorized actions. This issue is fixed in…
CVE-2024-42479 — Critical (CVSS 10.0): llama.cpp provides LLM inference in C/C++. The unsafe `data` pointer member in the `rpc_tensor` structure can cause…
CVE-2024-39791 — Critical (CVSS 10.0): Stack-based buffer overflow vulnerabilities affecting Vonets industrial wifi bridge relays and wifi bridge…

Browse all CWE-787 (Out-of-bounds Write) vulnerabilities →