CVE-2026-19983
HIGHCVE-2026-19983 is a high-severity (CVSS 8.3) CWE-77 vulnerability. O3 Security confirms whether CVE-2026-19983 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
A vulnerability was detected in GL.iNet A1300, AX1800, AXT1800, MT2500, MT3000, MT6000, X3000 and XE3000 4.8.x. This issue affects some unknown processing of the file /usr/bin/gl_nas_sys…
Description
A vulnerability was detected in GL.iNet A1300, AX1800, AXT1800, MT2500, MT3000, MT6000, X3000 and XE3000 4.8.x. This issue affects some unknown processing of the file /usr/bin/gl_nas_sys of the component NAS Command Service. The manipulation results in os command injection. The attack may be launched remotely. Upgrading to version 4.9.0 is capable of addressing this issue. It is suggested to upgrade the affected component. The vendor explains: "After our investigation, we have confirmed that the vulnerability described (...) does indeed exist."
Detection & mitigation playbook
VulnerabilityDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for the affected component. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Remediation status
No patched version of the affected component has shipped for CVE-2026-19983 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
Mitigate without a patch
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether CVE-2026-19983 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to CVE-2026-19983. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2026-19983 in your dependencies?
O3 detects CVE-2026-19983 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.