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TI-2025-08014 Aliases CVE-2025-8760GHSA-4jm8-qw96-rm2j

INSTAR 2K+/4K fcgi_server base64_decode buffer overflow

Priority MEDIUM 50CWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
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-119 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00874 59th percentileScored 2026-11-07
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
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
INSTAR2K+3.11.1 Build 1124—No fix listedCNA
INSTAR4K3.11.1 Build 1124—No fix listedCNA
  • 2K+ VendorINSTAR Affected 3.11.1 Build 1124 Fixed in — No fix listed CNA
  • 4K VendorINSTAR Affected 3.11.1 Build 1124 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-8760
  2. 2026-10-03 Alias added: GHSA-4jm8-qw96-rm2j

References

Other 1

  • TI-2025-08015 INSTAR 2K+/4K Backend IPC Server denial of service CVSS 4.0HIGH 8.7
  • TI-2025-08016 INSTAR 2K+/4K UART improper physical access control CVSS 4.0HIGH 7.0

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences