How severe is CVE-2026-8637?

CVE-2026-8637 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-8637 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-8637?

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-2026-8637 have an EU (EUVD) identifier?

Yes. CVE-2026-8637 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36048.

When was CVE-2026-8637 published?

CVE-2026-8637 was published on 2026-06-10 and last updated on 2026-06-17.

CVE-2026-8637

CVE-2026-8637 is a high-severity vulnerability 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-427.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v4: 8.5
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-36048
Weakness: CWE-427
Published: 2026-06-10
Last modified: 2026-06-17

Description

A potential uncontrolled search path vulnerability was reported in the LanSchool Classic client application that could allow a local authenticated user to execute arbitrary code with elevated privileges.

Frequently asked questions

What is CVE-2026-8637?: A potential uncontrolled search path vulnerability was reported in the LanSchool Classic client application that could allow a local authenticated user to execute arbitrary code with elevated privileges.
How severe is CVE-2026-8637?: CVE-2026-8637 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-8637 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-8637?: 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-2026-8637 have an EU (EUVD) identifier?: Yes. CVE-2026-8637 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36048.
When was CVE-2026-8637 published?: CVE-2026-8637 was published on 2026-06-10 and last updated on 2026-06-17.

References

https://support.lenovo.com/us/en/product_security/LEN-217400

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