# CVE-2026-41858: Cloud Foundry windows-utilities-release Weak PRNG in Get-RandomPassword

Source: https://junglewise.ai/threats/cve-2026-41858-cloud-foundry-windows-utilities-release-weak-prng-in-get  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-04. Updated: 2026-06-04  
License: CC BY 4.0 with a link back

CVE-2026-41858 · Severity: high · CVSS 7.5 · Published 2026-06-04

A security flaw in the Cloud Foundry windows-utilities-release package allows attackers to guess the local Administrator password on Windows virtual machines. This component is intended to secure systems by setting a random, unguessable password, but a technical error makes these passwords predictable based on when the machine started. An attacker who successfully guesses the password could gain full administrative control over the affected virtual machine.

Vendors: [Cloud Foundry Foundation](https://junglewise.ai/threats/vendors/cloud-foundry-foundation).

## Quick answers

**Is CVE-2026-41858 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-41858 being exploited in the wild.

**How severe is CVE-2026-41858?** High severity, with a CVSS score of 7.5, published 4 June 2026.

**Which products and versions are affected?** Cloud Foundry Foundation windows-utilities-release versions prior to v0.23.0.

**Is there a fix for CVE-2026-41858?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-41858 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-41858?** Check whether you run Cloud Foundry Foundation Windows Utilities Release. 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

The Get-RandomPassword function in the windows-utilities-release (BOSH-Ecosystem) utilizes a cryptographically weak pseudo-random number generator (PRNG) seeded by the system clock. Because the randomize_password job runs during the boot sequence, the entropy is insufficient, allowing a network-based attacker to estimate the VM boot time and generate a small list of candidate passwords. By brute-forcing this limited set, an attacker can recover the local Administrator credentials, bypassing intended hardening controls. The issue is resolved in version 0.23.0 by implementing a more secure cryptographic primitive.

## Affected products

- Cloud Foundry Foundation windows-utilities-release versions prior to v0.23.0

## Timeline

- 2026-06-01: advisory: Initial vulnerability report published by Cloud Foundry Foundation
- 2026-06-03: disclosed: CVE published to NVD dataset
- 2026-06-04: other: NVD record updated

## References

- [https://www.cloudfoundry.org/blog/cve-2026-41858-brute-forceable-windows-admin-creds/](https://www.cloudfoundry.org/blog/cve-2026-41858-brute-forceable-windows-admin-creds/)