What is CVE-2026-19980?

CVE-2026-19980 is a high-severity vulnerability in Gl.inet A1300, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.4/10. Published 2026-08-17.

How severe is CVE-2026-19980?

High severity. CVSS v3 base score is 7.4 out of 10.

RCE in Gl.inet A1300

CVE-2026-19980

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."

Published 2026-08-17 · last modified 2026-08-20.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.004 (30.9th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 30.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002

Affected products

Gl.inet A1300 — versions 4.0, 4.1, 4.2
Gl.inet Ax1800 — versions 4.0, 4.1, 4.2
Gl.inet Axt1800 — versions 4.0, 4.1, 4.2
Gl.inet Be10000 — versions 4.0, 4.1, 4.2
Gl.inet Be1400 — versions 4.0, 4.1, 4.2
Gl.inet Be3600 — versions 4.0, 4.1, 4.2
Gl.inet Be6500 — versions 4.0, 4.1, 4.2
Gl.inet Be9300 — versions 4.0, 4.1, 4.2
Gl.inet E5800 — versions 4.0, 4.1, 4.2
Gl.inet Mt2500 — versions 4.0, 4.1, 4.2

Weakness classification (CWE)

References

vuldb.com/vuln/391162 (technical-description, vdb-entry)
vuldb.com/vuln/391162/cti (signature, permissions-required)
vuldb.com/cve/CVE-2026-19980 (third-party-advisory)
vuldb.com/submit/873916 (third-party-advisory)
github.com/gl-inet/CVE-issues/blob/main/4.0.0/Language Auto-Update Cron RCE.md (patch)

Frequently asked questions

What is CVE-2026-19980?: CVE-2026-19980 is a high-severity vulnerability in Gl.inet A1300, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.4/10. Published 2026-08-17.
How severe is CVE-2026-19980?: High severity. CVSS v3 base score is 7.4 out of 10.