---
id: CVE-2026-93338
title: >-
  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…
summary: >-
  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…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-1188
vendor: Grandstream Networks
product: GWN7660ELR
affected:
  - GWN7660ELR < 1.0.27.6
published: '2026-09-18'
updated: '2026-09-22'
sourceUpdated: '2026-09-22T20:29:59.707'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93338'
references:
  - url: >-
      https://firmware.grandstream.com/BETA/Release_Note_GWN7660ELR_7665_1.0.27.6.pdf
    label: disclosure@vulncheck.com
  - url: 'https://www.grandstream.com/support/firmware'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/grandstream-gwn7660elr-information-disclosure-via-snmp-default-community-string
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
epss: 0.00533
epssPercentile: 0.42599
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-18T17:24:31.189256Z'
ingestedAt: '2026-09-18T16:45:41.409Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.