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CVE-2026-93338 (GCVE-0-2026-93338)

Vulnerability from nvd – Published: 2026-09-18 16:21 – Updated: 2026-09-18 17:24

Title

Grandstream GWN7660ELR < 1.0.27.6 Information Disclosure via SNMP Default Community String

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 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.

Severity

6.9 (Medium)


                        
                          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

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-18 17:24 UTC

CWE

CWE-1188 - Initialization of a Resource with an Insecure Default

Assigner

VulnCheck mitre root Scorecard

References

3 references

URL	Tags
https://firmware.grandstream.com/BETA/Release_Not…	release-notespatch
https://www.grandstream.com/support/firmware	product
https://www.vulncheck.com/advisories/grandstream-…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Grandstream Networks	GWN7660ELR	Affected: 0 , < 1.0.27.6 (custom)

Date Public

2026-07-13 00:00

Credits

Ahmed Embaby

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
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            "other": {
              "content": {
                "id": "CVE-2026-93338",
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                    "Exploitation": "none"
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                    "Automatable": "yes"
                  },
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                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-18T17:24:31.189256Z",
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        "providerMetadata": {
          "dateUpdated": "2026-09-18T17:24:47.072Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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      "descriptions": [
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          "lang": "en",
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            "vulnerabilityResponseEffort": "NOT_DEFINED"
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            "baseScore": 5.3,
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            "confidentialityImpact": "LOW",
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        },
        {
          "name": "Firmware Download",
          "tags": [
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          ],
          "url": "https://www.grandstream.com/support/firmware"
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          "url": "https://www.vulncheck.com/advisories/grandstream-gwn7660elr-information-disclosure-via-snmp-default-community-string"
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      "source": {
        "discovery": "UNKNOWN"
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      "title": "Grandstream GWN7660ELR \u003c 1.0.27.6 Information Disclosure via SNMP Default Community String",
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    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-93338",
    "datePublished": "2026-09-18T16:21:33.261Z",
    "dateReserved": "2026-09-17T18:41:40.756Z",
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  },
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}

CVE-2026-93338 (GCVE-0-2026-93338)

Vulnerability from cvelistv5 – Published: 2026-09-18 16:21 – Updated: 2026-09-18 17:24

Title

Grandstream GWN7660ELR < 1.0.27.6 Information Disclosure via SNMP Default Community String

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 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.

Severity

6.9 (Medium)


                        
                          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

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-18 17:24 UTC

CWE

CWE-1188 - Initialization of a Resource with an Insecure Default

Assigner

VulnCheck mitre root Scorecard

References

3 references

URL	Tags
https://firmware.grandstream.com/BETA/Release_Not…	release-notespatch
https://www.grandstream.com/support/firmware	product
https://www.vulncheck.com/advisories/grandstream-…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Grandstream Networks	GWN7660ELR	Affected: 0 , < 1.0.27.6 (custom)

Date Public

2026-07-13 00:00

Credits

Ahmed Embaby

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
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                "id": "CVE-2026-93338",
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                    "Exploitation": "none"
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                    "Automatable": "yes"
                  },
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                    "Technical Impact": "partial"
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        },
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      }
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            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
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}

Find a vulnerability

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2 vulnerabilities found for GWN7660ELR by Grandstream Networks

CVE-2026-93338 (GCVE-0-2026-93338)

CVE-2026-93338 (GCVE-0-2026-93338)