Insufficient Webserver Authentication
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-306.
Summary
TBEA TLogger V2.1.0.0B0.0.0.0 contains an authentication bypass in its web server. After a user has previously authenticated to the device, an unauthenticated attacker can directly access protected functionality through the /index.asp endpoint without providing valid credentials. This allows the attacker to access functionality intended for authenticated users and may expose or modify device configuration and data. Logging out from the bypassed state can additionally cause the web server to crash.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-15681
- 2026-10-03 Alias added: GHSA-m738-f6gp-rv3j
References
More TBEA vulnerabilities
- TI-2025-12157 Backdoor / default root credentials CVSS 4.0CRITICAL 9.3
- TI-2025-14300 Multiple Unauthenticated Denial-of-Service Conditions CVSS 4.0HIGH 8.8
- TI-2025-14299 Unauthenticated Resource Exhaustion CVSS 4.0HIGH 8.7
- TI-2025-12158 Unauthenticated SQL injection in TBEA TLogger CVSS 4.0CRITICAL 9.3
- TI-2025-14297 Information Disclosure via UART CVSS 4.0LOW 2.4
Sources
- CVE-2025-15681 · CVE Program
- CVE-2025-15681 · NVD
- FIRST EPSS
- GHSA-m738-f6gp-rv3j · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences