How severe is CVE-2026-4135?

CVE-2026-4135 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2026-4135 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-4135?

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

Does CVE-2026-4135 have an EU (EUVD) identifier?

Yes. CVE-2026-4135 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-22925.

When was CVE-2026-4135 published?

CVE-2026-4135 was published on 2026-04-15 and last updated on 2026-06-17.

CVE-2026-4135

CVE-2026-4135 is a medium-severity vulnerability with a CVSS 3.x base score of 6.6. 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-59.

Key facts

Severity: Medium (CVSS 3.x base score 6.6)
CVSS v4: 5.2
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-22925
Weakness: CWE-59
Published: 2026-04-15
Last modified: 2026-06-17

Description

During an internal security assessment, a potential vulnerability was discovered in Lenovo Software Fix, that during installation could allow a local authenticated user to perform an arbitrary file write with elevated privileges.

Frequently asked questions

What is CVE-2026-4135?: During an internal security assessment, a potential vulnerability was discovered in Lenovo Software Fix, that during installation could allow a local authenticated user to perform an arbitrary file write with elevated privileges.
How severe is CVE-2026-4135?: CVE-2026-4135 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2026-4135 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-4135?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-4135 have an EU (EUVD) identifier?: Yes. CVE-2026-4135 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-22925.
When was CVE-2026-4135 published?: CVE-2026-4135 was published on 2026-04-15 and last updated on 2026-06-17.

References

https://support.lenovo.com/us/en/product_security/LEN-213829

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