What is the CVSS score of CVE-2026-26792?

CVE-2026-26792 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Which versions of Ar300m16 Firmware are affected by CVE-2026-26792?

GL-iNet GL-AR300M16 routers running v4.3.11 contain critical command injection vulnerabilities that allow unauthenticated attackers to execute arbitrary commands with no patch currently available.

How to fix or mitigate CVE-2026-26792?

Within 24 hours: Identify all GL-AR300M16 v4.3.11 devices in your network inventory and isolate them from critical systems; disable remote management access and restrict administrative interfaces to specific trusted IP ranges only. Within 7 days: Evaluate replacement hardware or alternative routing solutions; contact GL-iNet for interim security guidance and patch timeline; implement enhanced monitoring for suspicious upgrade attempts on affected devices. Within 30 days: Complete migration away from vulnerable devices to patched alternatives; conduct forensic analysis of access logs to detect potential exploitation.

Ar300m16 Firmware CVE-2026-26792

CRITICAL

Command Injection (CWE-77)

2026-03-12 cve@mitre.org

Command Injection Ar300m16 Firmware

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 19:57 vuln.today

CVE Published

Mar 12, 2026 - 18:16 nvd

CRITICAL 9.8

DescriptionCVE.org

GL-iNet GL-AR300M16 v4.3.11 was discovered to contain multiple command injection vulnerabilities in the set_upgrade function via the modem_url, target_version, current_version, firmware_upload, hash_type, hash_value, and upgrade_type parameters. These vulnerabilities allow attackers to execute arbitrary commands via a crafted input.

AnalysisAI

GL-iNet GL-AR300M16 v4.3.11 has multiple command injection vulnerabilities in the set_upgrade function through seven different parameters. Each parameter provides an independent code execution vector on the router.

Technical ContextAI

The set_upgrade function concatenates multiple user-controlled parameters into system commands without sanitization (CWE-77). Seven separate parameters are vulnerable: modem_url, target_version, current_version, firmware_upload, hash_type, hash_value, and upgrade_type.