How severe is CVE-2018-25259?

CVE-2018-25259 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-25259 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-2018-25259?

CVE-2018-25259 affects Lizardsystems Terminal Services Manager. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-25259?

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-2018-25259 have an EU (EUVD) identifier?

Yes. CVE-2018-25259 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-21772.

When was CVE-2018-25259 published?

CVE-2018-25259 was published on 2026-04-22 and last updated on 2026-06-17.

CVE-2018-25259

CVE-2018-25259 is a high-severity vulnerability in Lizardsystems Terminal Services Manager with a CVSS 3.x base score of 8.4. 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-306.

Key facts

Severity: High (CVSS 3.x base score 8.4)
CVSS v4: 8.6
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2018-21772
Weakness: CWE-306
Affected product: Lizardsystems Terminal Services Manager
Published: 2026-04-22
Last modified: 2026-06-17

Description

Terminal Services Manager 3.1 contains a stack-based buffer overflow vulnerability in the computer names field that allows local attackers to execute arbitrary code by triggering structured exception handling. Attackers can craft a malicious input file with shellcode and jump instructions that overwrite the SEH handler pointer to execute calc.exe or other payloads when imported through the add computers wizard.

Frequently asked questions

What is CVE-2018-25259?: Terminal Services Manager 3.1 contains a stack-based buffer overflow vulnerability in the computer names field that allows local attackers to execute arbitrary code by triggering structured exception handling. Attackers can craft a malicious input file with shellcode and jump instructions that overwrite the SEH handler pointer to execute calc.exe or other payloads when imported through the add computers wizard.
How severe is CVE-2018-25259?: CVE-2018-25259 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-25259 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-2018-25259?: CVE-2018-25259 affects Lizardsystems Terminal Services Manager. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-25259?: 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-2018-25259 have an EU (EUVD) identifier?: Yes. CVE-2018-25259 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-21772.
When was CVE-2018-25259 published?: CVE-2018-25259 was published on 2026-04-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:lizardsystems:terminal_services_manager:*:*:*:*:*:*:*:*

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