CVE-2025-8760
INSTAR 2K+/4K fcgi_server base64_decode buffer overflow
- State
- Published
- Severity
- 9.3 Critical
- Published
- Aug 13, 2025
- Updated
- Aug 13, 2025
- Reserved
- Aug 8, 2025
Description
A vulnerability was identified in INSTAR 2K+ and 4K 3.11.1 Build 1124. This affects the function base64_decode of the component fcgi_server. The manipulation of the argument Authorization leads to buffer overflow. It is possible to initiate the attack remotely.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X | VulDB |
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:X/RL:W/RC:R | VulDB |
| 3.0 | 9.8 Critical | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:X/RL:W/RC:R | VulDB |
| 2.0 | 10.0 High | AV:N/AC:L/Au:N/C:C/I:C/A:C/E:ND/RL:W/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
2K+INSTAR |
|
4KINSTAR |
|
References
- VDB-319863 | INSTAR 2K+/4K fcgi_server base64_decode buffer overflowvdb-entrytechnical-description
- VDB-319863 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- https://modzero.com/static/MZ-25-03_modzero_INSTAR.pdfrelated
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.