INSTAR 2K+/4K Backend IPC Server denial of service
Priority MEDIUM 55CWE-404Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-404.
Summary
A vulnerability has been found in INSTAR 2K+ and 4K 3.11.1 Build 1124. This vulnerability affects unknown code of the component Backend IPC Server. The manipulation leads to denial of service. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.09093 95th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
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-2025-8761
- 2026-10-03 Alias added: GHSA-c2jm-6qr2-hwhx
- 2026-10-14 EPSS moved to the 95th–99th percentile
References
More INSTAR vulnerabilities
- TI-2025-08014 INSTAR 2K+/4K fcgi_server base64_decode buffer overflow CVSS 4.0CRITICAL 9.3
- TI-2025-08016 INSTAR 2K+/4K UART improper physical access control CVSS 4.0HIGH 7.0
Sources
- CVE-2025-8761 · CVE Program
- CVE-2025-8761 · NVD
- FIRST EPSS
- GHSA-c2jm-6qr2-hwhx · 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