CVE-2026-93338: Initialization of a Resource with an Insecure Default in Grandstream Networks GWN7660ELR
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.
AI Analysis
Technical Summary
CVE-2026-93338 describes an information disclosure vulnerability in Grandstream Networks GWN7660ELR devices with firmware versions prior to 1.0.27.6. The SNMP v2c service is configured with the default community string 'public', which is well-known and unauthenticated. Attackers can remotely query standard Management Information Bases (MIBs) over the SNMP port to retrieve detailed system and network information. This includes operating system and kernel versions, running process names and arguments, network interface configurations, routing tables, ARP tables, active TCP connections, and file system paths. This vulnerability facilitates reconnaissance that could aid further attacks.
Potential Impact
Unauthenticated remote attackers can obtain sensitive system and network information from affected devices by querying SNMP with the default community string. This information disclosure can aid attackers in mapping the device and adjacent network infrastructure, potentially enabling further targeted attacks or exploitation.
Mitigation Recommendations
A fix is available in firmware version 1.0.27.6. Users should upgrade affected devices to version 1.0.27.6 or later to remediate this vulnerability. Until upgraded, it is recommended to change the default SNMP community string from 'public' to a strong, unique value or disable SNMP if not required.
CVE-2026-93338: Initialization of a Resource with an Insecure Default in Grandstream Networks GWN7660ELR
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.
CVSS v4.0
Score 6.9medium
Affected software
Grandstream Networks
GWN7660ELR
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-93338 describes an information disclosure vulnerability in Grandstream Networks GWN7660ELR devices with firmware versions prior to 1.0.27.6. The SNMP v2c service is configured with the default community string 'public', which is well-known and unauthenticated. Attackers can remotely query standard Management Information Bases (MIBs) over the SNMP port to retrieve detailed system and network information. This includes operating system and kernel versions, running process names and arguments, network interface configurations, routing tables, ARP tables, active TCP connections, and file system paths. This vulnerability facilitates reconnaissance that could aid further attacks.
Potential Impact
Unauthenticated remote attackers can obtain sensitive system and network information from affected devices by querying SNMP with the default community string. This information disclosure can aid attackers in mapping the device and adjacent network infrastructure, potentially enabling further targeted attacks or exploitation.
Mitigation Recommendations
A fix is available in firmware version 1.0.27.6. Users should upgrade affected devices to version 1.0.27.6 or later to remediate this vulnerability. Until upgraded, it is recommended to change the default SNMP community string from 'public' to a strong, unique value or disable SNMP if not required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-17T18:41:40.756Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aad678855bf5e2cf53e103e
Added to database: 09/18/2026, 16:32:08 UTC
Last enriched: 09/18/2026, 16:46:53 UTC
Last updated: 09/18/2026, 22:32:06 UTC
Views: 10
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