CVE-2025-34155 Tibbo AggreGate Network Manager < 6.40.05 Login Functionality User Enumeration
Unauthenticated attackers can enumerate valid usernames via login response discrepancies, facilitating targeted brute-force attacks against Tibbo AggreGate Network Manager.
- 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-2025-34155?
CVE-2025-34155 is a medium-severity vulnerability in Tibbo Systems AggreGate Network Manager, published on 23 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Tibbo AggreGate Network Manager < 6.40.05 contains an observable response discrepancy in its login functionality. Authentication failure messages differ based on whether a supplied username exists or not, allowing an unauthenticated remote attacker to infer valid account identifiers. This can facilitate user enumeration and increase the likelihood of targeted brute-force or credential-stuffing attacks.
Weakness: CWE-204
Which versions are affected by CVE-2025-34155?
How do I fix CVE-2025-34155?
No fix has been published for CVE-2025-34155 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-34155 being exploited?
There is no known exploitation of CVE-2025-34155 in the wild and no public exploit code.
Sources
Also known as GHSA-2pw7-5gjq-98f6.