CVE-2026-33923 Update bundle signature bypass in Guardian/CMC before 26.4.0
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-33923?
CVE-2026-33923 is a high-severity vulnerability in Nozomi Networks CMC, published on 29 Oct 2026.
Official description
A signature verification vulnerability was discovered in the update installation functionality due to inconsistent validation of the update bundle contents. An attacker with administrative privileges can remotely supply a crafted update bundle that passes signature verification but runs an unsigned script when the bundle is installed. The script runs with root privileges, allowing the attacker to read or modify sensitive data, change the appliance configuration, or shut down the appliance.
Weakness: CWE-347
Which versions are affected by CVE-2026-33923?
How do I fix CVE-2026-33923?
No fix has been published for CVE-2026-33923 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-33923 being exploited?
There is no known exploitation of CVE-2026-33923 in the wild and no public exploit code.
Sources
Also known as GHSA-9v7w-2fr3-g7q8.