What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-18 · updated 2026-09-22
• Weakness: CWE-1188

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.

Affected products

• Grandstream Networks GWN7660ELR: before 1.0.27.6 — fixed in 1.0.27.6

How to fix

Upgrade to a fixed version: Grandstream Networks GWN7660ELR 1.0.27.6. Check the vendor advisory for mitigations.

References

• https://firmware.grandstream.com/BETA/Release_Note_GWN7660ELR_7665_1.0.27.6.pdf
• https://www.grandstream.com/support/firmware
• https://www.vulncheck.com/advisories/grandstream-gwn7660elr-information-disclosure-via-snmp-default-community-string

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