CVE-2026-41858 Weak cryptography in windows-utilities-release
Weak randomness in password generation allows attackers to recover Administrator passwords, enabling privilege escalation and account takeover.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-41858?
CVE-2026-41858 is a medium-severity vulnerability in Cloud Foundry Foundation windows-utilities-release, published on 4 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Weak Randomness / Insecure Cryptographic Primitive (CWE-338) in Get-RandomPassword in BOSH-Ecosystem / windows-utilities-release allows a network attacker to estimate VM boot time and reconstruct a small candidate list to recover the Administrator password. The randomize_password job exists solely to lock the local Administrator account behind an unguessable password as a hardening control. Because the password is derived from a predictable, clock-seeded PRNG, a network attacker who can estimate VM boot time can reconstruct a small candidate list and recover the Administrator password, defeating the hardening control.
Affected versions: - windows-utilities-release: all versions prior to v0.23.0 (inclusive); fixed in v0.23.0 or later
Weakness: CWE-338
Which versions are affected by CVE-2026-41858?
How do I fix CVE-2026-41858?
No fix has been published for CVE-2026-41858 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-41858 being exploited?
There is no known exploitation of CVE-2026-41858 in the wild and no public exploit code.
Sources
Also known as GHSA-f9p6-prpf-3757.