CVE-2025-8760

CRITICAL

INSTAR 2K+/4K <3.11.1.1124 - Buffer Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2025-8760. PoCs published by born0monday.

AI-analyzed exploit summary This repository contains a functional exploit for CVE-2025-8760, a stack-based buffer overflow vulnerability in INSTAR 2K+/4K cameras (version <= 3.10.0). The exploit leverages ROP chains to achieve remote code execution (RCE) by overflowing a buffer and manipulating the stack to execute arbitrary commands.

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.

Exploits (1)

github WORKING POC 4 stars
by born0monday · pythonpoc
https://github.com/born0monday/CVE-2025-8760

This repository contains a functional exploit for CVE-2025-8760, a stack-based buffer overflow vulnerability in INSTAR 2K+/4K cameras (version <= 3.10.0). The exploit leverages ROP chains to achieve remote code execution (RCE) by overflowing a buffer and manipulating the stack to execute arbitrary commands.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Complex
Reliability
Reliable
Target: INSTAR 2K+/4K cameras (<= 3.10.0)
No auth needed
Prerequisites: Network access to the target device · Target device running vulnerable firmware
devstral-2 · analyzed Feb 19, 2026 Full analysis →

References (3)

Core 3
Core References
Permissions Required, VDB Entry vdb-entry technical-description
https://vuldb.com/?id.319863
Permissions Required, VDB Entry signature permissions-required
https://vuldb.com/?ctiid.319863

Scores

CVSS v3 9.8
EPSS 0.0070
EPSS Percentile 48.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-119 CWE-120
Status published
Products (2)
INSTAR/2K+ 3.11.1 Build 1124
INSTAR/4K 3.11.1 Build 1124
Published Aug 13, 2025
Tracked Since Feb 18, 2026