Vulnerability · CVE-2025-34155
Tibbo AggreGate Network Manager < 6.40.05 contains an observable response discrepancy in its login functionality.
Published Oct 23, 2025 · catalog updated May 14, 2026 · Tibbo Systems AggreGate Network Manager
Last checked Oct 27, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2025-34155. EPSS is 0.53%. Act only if a listed version of Tibbo Systems AggreGate Network Manager is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
- CVE-2025-34156 · Medium
- Severity
- Medium6.9
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.53%
- Remediation
- Version ranges on file
- Affected products
- vendor Tibbo Systems AggreGate Network Manager 0 <6.40.05
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor Tibbo Systems AggreGate Network Manager 0 <6.40.050 <6.40.05
How to fix CVE-2025-34155
Upgrade
CVE-2025-34155 lists a fix boundary at 6.40.05. Compare the installed build with that boundary before you change production.
Version check
Seen in 0 <6.40.05
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2025-34155. EPSS is 0.53%. Act only if a listed version of Tibbo Systems AggreGate Network Manager is installed.
Which versions are affected?
Compare what you have installed with Tibbo Systems AggreGate Network Manager 0 <6.40.05 0 <6.40.05. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.53%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Oct 23, 2025 · EUVD
Detected
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 att
May 14, 2026 · EUVD
Updated
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 att
Sources
- CVE.orgVulnerability recordCVE-2025-34155
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2025-34155
30-day exploitation probability 0.53%
first.org - EUVDVulnerability recordEUVD-2025-35703
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 identifi
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Oct 27, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSOct 27, 2026
- CVE.orgOct 24, 2026
- EUVDOct 23, 2026