CVE-2026-93338Network attack vector

Unauthenticated system information disclosure via default SNMP community

Published Sep 18, 2026 · Updated Sep 18, 2026

Information disclosure in Grandstream Networks GWN7660ELR before 1.0.27.6 allows remote attackers to read system data over SNMP v2c. The service accepts the default community string 'public' and returns standard MIB data, including kernel details, process arguments, interfaces, routes, ARP entries, connections, and file paths. No authentication or user interaction is required when SNMP is network-reachable and the default community remains configured, enabling device and adjacent-network reconnaissance.

CVSS severity6.9
Medium
EPSS probability0.53%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Grandstream Networks GWN7660ELR before 1.0.27.6 allows remote attackers to read system data over SNMP v2c. The service accepts the default community string 'public' and returns standard MIB data, including kernel details, process arguments, interfaces, routes, ARP entries, connections, and file paths. No authentication or user interaction is required when SNMP is network-reachable and the default community remains configured, enabling device and adjacent-network reconnaissance.

The record

CVE
CVE-2026-93338
Published
Sep 18, 2026
Updated
Sep 18, 2026
Vendor
Grandstream Networks
Product
GWN7660ELR
Classifications
CWE-1188, T1082, T1016, T1057
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.0.27.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Grandstream Networks · GWN7660ELRversion=0 <1.0.27.6

Published CVSS scores

5.3VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
6.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1188Initialization of a Resource with an Insecure Default
T1082System Information Discovery
T1016System Network Configuration Discovery
T1057Process Discovery

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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