# CVE-2026-19980: GL.iNet XE3000 Language Update ui.update_langs code injection

> Remote attackers can inject code via the Language Update function in GL.iNet routers, potentially compromising the device.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:X`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Aug 2026
- **Updated:** 19 Aug 2026
- **Also known as:** GHSA-qpr4-j52w-4p46

## What is CVE-2026-19980?

CVE-2026-19980 is a medium-severity code injection vulnerability in GL.iNet A1300, published on 17 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A security flaw has been discovered 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 issue is the function ui.update_langs of the component Language Update. Performing a manipulation of the argument hour/min/week results in code injection. The attack can be initiated remotely. The vendor explains: "After our investigation, we have confirmed that the vulnerability described (...) does indeed exist."

Weakness: CWE-94 (Improper Control of Generation of Code), CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component)

## Which versions are affected by CVE-2026-19980?


## How do I fix CVE-2026-19980?

No fix has been published for CVE-2026-19980 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-19980 being exploited?

There is no known exploitation of CVE-2026-19980 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-19980 and fix it if it is affected.

What it is: CVE-2026-19980 is a medium-severity code injection vulnerability in GL.iNet A1300, published on 17 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-19980 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-2026-19980/ (Markdown: https://insights.sbomify.com/CVE-2026-19980/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-19980
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-19980
- OSV: https://osv.dev/vulnerability/CVE-2026-19980

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-19980/
Summaries are generated and may contain mistakes; the official description above is the record.