RCE in Grandstream Networks Gwn7660elr
CVE-2026-93338
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (45.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- firmware.grandstream.com/BETA/Release_Note_GWN7660ELR_7665_1.0.27.6.pdf (release-notes, patch)
- www.grandstream.com/support/firmware (product)
- www.vulncheck.com/advisories/grandstream-gwn7660elr-information-disclosure-via-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-93338?
- CVE-2026-93338 is a medium-severity vulnerability in Grandstream Networks Gwn7660elr, classified under Initialization of a Resource with an Insecure Default. CVSS score: 5.3/10. Published 2026-09-18.
- How severe is CVE-2026-93338?
- Medium severity. CVSS v3 base score is 5.3 out of 10.