by Kastro
Paper/Archive/CVE-2025-8760

CVE-2025-8760

INSTAR 2K+ — INSTAR 2K+/4K fcgi_server base64_decode buffer overflow

EPSS 0.8%CVSS 9.8
critical.is priorityof 100
41
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 57.4.574 × 2011.5No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
2K+3.11.1 Build 1124–CNA
4K3.11.1 Build 1124–CNA

Scores by source

VulDB (CNA)9.8CVSS: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 (CNA)9.8CVSS: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 (CNA)9.3CVSS: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
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

writeupvuldb.com/?id.319863refvuldb.com/?ctiid.319863refmodzero.com/static/MZ-25-03_modzero_INSTAR.pdf