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CVE-2026-93338— Grandstream GWN7660ELR < 1.0.27.6 Information Disclosure via SNMP Default Community String

Quick assessment

Affected
Grandstream Networks GWN7660ELR
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.

Grandstream GWN7660ELR 在固件版本 1.0.27.6 之前存在一个信息泄露漏洞，允许未认证的远程攻击者通过查询配置了默认社区字符串 'public' 的 SNMP v2c 服务，获取敏感的系统信息。攻击者可以通过 SNMP 端口查询标准 MIB，从而获取操作系统及内核版本、运行中的进程名称和命令行参数、网络接口配置、路由表条目、ARP 表映射、活动 TCP 连接详情以及文件系统路径，从而实现对设备及其周边网络基础设施的详细侦察。

CVSS 5.3 · Medium EPSS 0.31% · P24

Possible ATT&CK Techniques 2 AI

T1006 · Direct Volume Access T1042

Affected Version Matrix 1

VendorProduct Version RangeStatus
Grandstream Networks GWN7660ELR < 1.0.27.6 affected
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I. Basic Information for CVE-2026-93338

Vulnerability Information
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Vulnerability Title
Grandstream GWN7660ELR < 1.0.27.6 Information Disclosure via SNMP Default Community String
Source: CVE Program / CVE List V5
Vulnerability Description
Grandstream GWN7660ELR before firmware version 1.0.27.6 contains an information disclosure vulnerability that allows unauthenticated remote attackers to obtain sensitive system information by querying the SNMP v2c service configured with the default community string 'public'. Attackers can query standard MIBs over the SNMP port to retrieve operating system and kernel version, running process names and command-line arguments, network interface configuration, routing table entries, ARP table mappings, active TCP connection details, and file system paths, enabling detailed reconnaissance of the device and adjacent network infrastructure.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不安全的默认资源初始化
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Grandstream Networks GWN7660ELR 0 ~ 1.0.27.6 -

II. Public POCs for CVE-2026-93338

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III. Intelligence Information for CVE-2026-93338

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Other References for CVE-2026-93338 (2)

IV. Related Vulnerabilities

Same vendor: Grandstream Networks
Same weakness: CWE-1188

V. Comments for CVE-2026-93338

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