# CVE-2026-19979: GL.iNet XE3000 WebDAV Service MOVE authorization

> Attackers can bypass authorization checks in the WebDAV service to perform unauthorized COPY and MOVE operations on GL.iNet routers.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:X`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Aug 2026
- **Updated:** 18 Aug 2026
- **Also known as:** GHSA-39pc-4mfv-4php

## What is CVE-2026-19979?

CVE-2026-19979 is a medium-severity missing authorization vulnerability in GL.iNet A1300, published on 17 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability was identified in GL.iNet A1300, AX1800, AXT1800, BE1400, BE3600, BE6500, BE9300, BE10000, E5800, MT2500, MT3000, MT3600BE, MT5000, MT6000, X2000, X3000 and XE3000 up to 4.8.x. Affected by this vulnerability is the function COPY/MOVE of the component WebDAV Service. Such manipulation leads to authorization bypass. It is possible to launch the attack remotely. The vendor explains: "After our investigation, we have confirmed that the vulnerability described (...) does indeed exist."

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key), CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2026-19979?


## How do I fix CVE-2026-19979?

No fix has been published for CVE-2026-19979 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-19979 being exploited?

There is no known exploitation of CVE-2026-19979 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-19979 and fix it if it is affected.

What it is: CVE-2026-19979 is a medium-severity missing authorization vulnerability in GL.iNet A1300, published on 17 Aug 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-2026-19979 in the wild and no public exploit code.

Affected product: GL.iNet A1300. 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-2026-19979/ (Markdown: https://insights.sbomify.com/CVE-2026-19979/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-19979
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-19979
- OSV: https://osv.dev/vulnerability/CVE-2026-19979

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-19979/
Summaries are generated and may contain mistakes; the official description above is the record.