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CVE-2026-76524— Open Source Snort 3 Control Channel Socket Aribitrary Command Execution Vulnerability

Quick assessment

Affected
Cisco Cisco Open Source Snort3
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

开源 Snort 3 的控制通道套接字实现中存在一个漏洞。该漏洞允许已认证的、本地且权限较低的攻击者以 Snort 3 进程用户的身份执行任意命令。 此漏洞的成因是：当本地用户连接至 Snort 控制通道套接字时，系统未进行身份验证。攻击者可通过以本地用户身份连接至 Snort 3 控制通道套接字来利用该漏洞。一旦成功利用，攻击者不仅能够执行任意命令，还可读取和写入 Snort 3 进程的内存。

CVSS 7.8 · High

Affected Version Matrix 105

VendorProduct Version RangeStatus
Cisco Cisco Open Source Snort3 3.12.2.0 affected
3.1.2.0 affected
3.1.3.0 affected
3.1.4.0 affected
3.1.5.0 affected
3.1.6.0 affected
3.1.7.0 affected
3.1.8.0 affected
… +97 more rows
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I. Basic Information for CVE-2026-76524

Vulnerability Information
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Vulnerability Title
Open Source Snort 3 Control Channel Socket Aribitrary Command Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the control channel socket implementation of Open Source Snort 3 could allow an authenticated, local attacker with low privileges to execute arbitrary commands as the Snort 3 process user. This vulnerability is due to a lack of authentication when a local user connects to the Snort control channel socket. An attacker could exploit this vulnerability by connecting to the Snort 3 control channel socket as a local user. A successful exploit could allow the attacker to execute arbitrary commands as well as read and write Snort 3 process memory.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco Open Source Snort3 3.12.2.0 -

II. Public POCs for CVE-2026-76524

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III. Intelligence Information for CVE-2026-76524

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Other References for CVE-2026-76524 (1)

Same Patch Batch · Cisco · 2026-10-21 · 34 CVEs total

CVE-2026-76466 9.8 CRITICAL Cisco Expressway Series Remote Code Execution Vulnerability
CVE-2026-76473 9.8 CRITICAL Cisco Unified Communications Products Hardening Release: October 2026 - Improper control o
CVE-2026-76474 9.8 CRITICAL Cisco Unified Communications Products Hardening Release: October 2026 - Improper Authentic
CVE-2026-76475 9.3 CRITICAL Cisco Unified Communications Products Hardening Release: October 2026 - Cross-site Scripti
CVE-2026-20043 9.0 CRITICAL Multiple Cisco Products Snort 3 Software Hardening Release: October 2026
CVE-2026-76478 8.8 HIGH Cisco Unified Communications Products Hardening Release: October 2026 - Improper Access Co
CVE-2026-76476 8.8 HIGH Cisco Unified Communications Products Hardening Release: October 2026 - Improper Input Val
CVE-2026-76477 8.8 HIGH Cisco Unified Communications Products Hardening Release: October 2026 - Injection Vulnerab
CVE-2026-76490 8.6 HIGH Cisco Expressway Series Software Hardening Release: October 2026 - Out-of-bounds Write Vul
CVE-2026-20291 7.8 HIGH Multiple Cisco Products Snort 3 Software Hardening Release: October 2026
CVE-2026-76495 7.8 HIGH Cisco Expressway Series Software Hardening Release: October 2026 - Incorrect Permission As
CVE-2026-76494 7.8 HIGH Cisco Expressway Series Software Hardening Release: October 2026 - Code Injection Vulnerab
CVE-2026-76479 7.8 HIGH Cisco Unified Communications Products Hardening Release: October 2026 - Path Traversal Vul
CVE-2026-76505 7.5 HIGH Cisco IOS XR Software for ASR 9000 Series Routers IPv4 Unicast Packets Denial of Service V
CVE-2026-20236 7.5 HIGH Multiple Cisco Products Snort 3 Software Hardening Release: October 2026
CVE-2026-20356 7.5 HIGH Multiple Cisco Products Snort 3 Software Hardening Release: October 2026
CVE-2026-76481 7.5 HIGH Cisco Unified Communications Products Hardening Release: October 2026 - Improper Check or
CVE-2026-76493 7.5 HIGH Cisco Expressway Series Software Hardening Release: October 2026 - Uncaught Exception Vuln
CVE-2026-76492 7.5 HIGH Cisco Expressway Series Software Hardening Release: October 2026 - NULL Pointer Vulnerabil
CVE-2026-76491 7.5 HIGH Cisco Expressway Series Software Hardening Release: October 2026 - Denial of Service Vulne

Showing top 20 of 34 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cisco Open Source Snort3
Same vendor: Cisco
Same weakness: CWE-306

V. Comments for CVE-2026-76524

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