# CVE-2026-11813: Lenovo Filez Client privilege escalation via improper permissions

Source: https://junglewise.ai/threats/cve-2026-11813-lenovo-filez-client-privilege-escalation-via-improper-permissions  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-10. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-11813 · Severity: high · CVSS 7.8 · Published 2026-09-10

The Lenovo Filez Client application contains an improper permissions vulnerability that allows authenticated local users to escalate their privileges on the system. An attacker with a user account on a machine running Filez Client could gain elevated access to perform unauthorized administrative actions or access sensitive data, compromising system integrity and data security.

Vendors: [Lenovo](https://junglewise.ai/threats/vendors/lenovo).

## Quick answers

**Is CVE-2026-11813 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-11813 being exploited in the wild.

**How severe is CVE-2026-11813?** High severity, with a CVSS score of 7.8, published 10 September 2026.

**Which products and versions are affected?** Lenovo Filez Client Windows versions prior to 11.5.1.0 (Enterprise) and 11.7.6.0 (Public).

**Is there a fix for CVE-2026-11813?** A patch was published on 2026-07-14: Security advisory issued with patch availability Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-11813 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-11813?** Check whether you run Lenovo Filez Client at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A privilege escalation vulnerability exists in Lenovo Filez Client due to improper permissions configuration. The vulnerability is exploitable by a local authenticated user without requiring elevated privileges initially, allowing them to escalate to higher privilege levels through the vulnerable permission mechanism. The attack vector is local and requires an authenticated user account already present on the system. Patches are available: Windows Enterprise Edition should be updated to version 11.5.1.0 or later, and Windows Public Edition should be updated to version 11.7.6.0 or later.

## Affected products

- Lenovo Filez Client Windows versions prior to 11.5.1.0 (Enterprise) and 11.7.6.0 (Public)

## Timeline

- 2026-09-10: disclosed
- 2026-07-14: patched: Security advisory issued with patch availability

## References

- [https://www.filez.com/en/securityPolicy/5.html?1788882250](https://www.filez.com/en/securityPolicy/5.html?1788882250)