CVE-2025-8760CRITICAL 9.8EPSS p48.2%

CVE-2025-8760CVE-2025-8760

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.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.70% probability of exploitation · percentile 48.2% · 2026-06-19T12:03:05Z
Published2025-08-13
Last modified2026-04-15

Underlying weaknesses· 2

CWE-119CWE-120

References

  1. https://modzero.com/static/MZ-25-03_modzero_INSTAR.pdf
  2. https://vuldb.com/?ctiid.319863
  3. https://vuldb.com/?id.319863

2

TypeTargetConfidenceTier
WeaknessImproper Restriction of Operations within the Bounds of a Memory Buffercwe-1190%live
WeaknessBuffer Copy without Checking Size of Input ('Classic Buffer Overflow')cwe-1200%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.