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

> Unauthenticated attackers can retrieve sensitive system and network configuration details from Grandstream access points via SNMP using the default community string.

- **Severity:** Medium 6.9 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Sep 2026
- **Updated:** 18 Sep 2026
- **Also known as:** GHSA-w3m6-5c22-j92h

## What is CVE-2026-93338?

CVE-2026-93338 is a medium-severity vulnerability in Grandstream Networks GWN7660ELR, published on 18 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-1188 (Initialization of a Resource with an Insecure Default)

## Which versions are affected by CVE-2026-93338?


## How do I fix CVE-2026-93338?

No fix has been published for CVE-2026-93338 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-93338 being exploited?

There is no known exploitation of CVE-2026-93338 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-93338 and fix it if it is affected.

What it is: CVE-2026-93338 is a medium-severity vulnerability in Grandstream Networks GWN7660ELR, published on 18 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-93338 in the wild and no public exploit code.

Affected product: Grandstream Networks GWN7660ELR. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-93338/ (Markdown: https://insights.sbomify.com/CVE-2026-93338/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-93338
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-93338
- OSV: https://osv.dev/vulnerability/CVE-2026-93338

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-93338/
Summaries are generated and may contain mistakes; the official description above is the record.