# CVE-2026-19980: GL.iNet Router Code Injection in Language Update

Source: https://junglewise.ai/threats/cve-2026-19980-gl-inet-router-code-injection-in-language-update  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-17. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-19980 · Severity: high · CVSS 7.4 · Published 2026-08-17

GL.iNet routers include a language auto-update feature that is vulnerable to code injection attacks. An attacker can manipulate scheduling parameters in the language update function to inject and execute arbitrary commands with root privileges on the router, potentially enabling network compromise, credential theft, and lateral movement into connected networks.

Technologies: [GL.iNet A1300](https://junglewise.ai/threats/technologies/a1300), [GL.iNet AX1800](https://junglewise.ai/threats/technologies/ax1800), [GL.iNet AXT1800](https://junglewise.ai/threats/technologies/axt1800), [GL.iNet BE10000](https://junglewise.ai/threats/technologies/be10000), [GL.iNet BE1400](https://junglewise.ai/threats/technologies/be1400), [GL.iNet BE3600](https://junglewise.ai/threats/technologies/be3600), [GL.iNet E5800](https://junglewise.ai/threats/technologies/e5800), [GL.iNet MT2500](https://junglewise.ai/threats/technologies/mt2500), [GL.iNet MT3000](https://junglewise.ai/threats/technologies/mt3000), [GL.iNet MT3600BE](https://junglewise.ai/threats/technologies/mt3600be), [GL.iNet MT5000](https://junglewise.ai/threats/technologies/mt5000), [GL.iNet MT6000](https://junglewise.ai/threats/technologies/mt6000), [GL.iNet X2000](https://junglewise.ai/threats/technologies/x2000), [GL.iNet X3000](https://junglewise.ai/threats/technologies/x3000), [GL.iNet XE3000](https://junglewise.ai/threats/technologies/xe3000). Vendors: [GL.iNet](https://junglewise.ai/threats/vendors/gl-inet).

## Quick answers

**Is CVE-2026-19980 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-19980 being exploited in the wild.

**How severe is CVE-2026-19980?** High severity, with a CVSS score of 7.4, published 17 August 2026.

**Which products and versions are affected?** GL.iNet A1300 4.6 through 4.8.x; GL.iNet AX1800 4.6 through 4.8.x; GL.iNet AXT1800 4.6 through 4.8.x; GL.iNet BE10000 4.6 through 4.8.x; and 11 more.

**Is there a fix for CVE-2026-19980?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-19980 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-19980?** Check whether you run GL.iNet A1300, GL.iNet AX1800, GL.iNet AXT1800 or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a code injection flaw in the ui.update_langs RPC method of the Language Update component across GL.iNet router models. The vulnerable function accepts hour, min, and week parameters for scheduling automatic language updates but performs insufficient input validation—it checks only for parameter presence without enforcing numeric type constraints before writing values to gl_timer. An unauthenticated remote attacker can craft malicious requests with shell metacharacters or command injection payloads in these time fields, achieving arbitrary command execution with root privileges. The impact includes persistent router configuration modification, DNS/firewall/NAT manipulation, sensitive file access, and potential pivoting into connected networks. Patches are available via firmware updates above 4.8.x.

## Affected products

- GL.iNet A1300 4.6 through 4.8.x
- GL.iNet AX1800 4.6 through 4.8.x
- GL.iNet AXT1800 4.6 through 4.8.x
- GL.iNet BE1400 4.6 through 4.8.x
- GL.iNet BE3600 4.6 through 4.8.x
- GL.iNet BE6500 4.6 through 4.8.x
- GL.iNet BE9300 4.6 through 4.8.x
- GL.iNet BE10000 4.6 through 4.8.x
- GL.iNet E5800 4.6 through 4.8.x
- GL.iNet MT2500 4.6 through 4.8.x
- GL.iNet MT3000 4.6 through 4.8.x
- GL.iNet MT3600BE 4.6 through 4.8.x
- GL.iNet MT5000 4.6 through 4.8.x
- GL.iNet MT6000 4.6 through 4.8.x
- GL.iNet X2000 4.6 through 4.8.x
- GL.iNet X3000 4.6 through 4.8.x
- GL.iNet XE3000 4.6 through 4.8.x

## Timeline

- 2026-08-17: disclosed

## References

- [https://github.com/gl-inet/CVE-issues/blob/main/4.0.0/Language%20Auto-Update%20Cron%20RCE.md](https://github.com/gl-inet/CVE-issues/blob/main/4.0.0/Language%20Auto-Update%20Cron%20RCE.md)
- [https://vuldb.com/cve/CVE-2026-19980](https://vuldb.com/cve/CVE-2026-19980)

## Related threats

- [GL.iNet multiple routers OS command injection in NAS service](https://junglewise.ai/threats/cve-2026-19983-gl-inet-multiple-routers-os-command-injection-in-nas-service)
- [GL.iNet BE9300 and MT6000 OS command injection in firewall-management RPC](https://junglewise.ai/threats/cve-2026-19982-gl-inet-be9300-and-mt6000-os-command-injection-in-firewall)
- [GL.iNet Router OS command injection in Wi-Fi Timer Power-Schedule](https://junglewise.ai/threats/cve-2026-19981-gl-inet-router-os-command-injection-in-wi-fi-timer-power-schedule)
- [GL.iNet WebDAV authorization bypass in COPY/MOVE](https://junglewise.ai/threats/cve-2026-19979-gl-inet-webdav-authorization-bypass-in-copy-move)
- [GL.iNet AX1800 command injection in RPC endpoint](https://junglewise.ai/threats/cve-2026-18787-gl-inet-ax1800-command-injection-in-rpc-endpoint)