CVE-2026-26793Public exploitNetwork attack vector

Authenticated command execution via private-key concatenation

Published Mar 12, 2026 · Updated Mar 12, 2026

Command injection in GL-iNet GL-AR300M16 firmware 4.3.11 allows remote authenticated users to execute arbitrary system commands. The wg-server set_config handler directly concatenates the user-controlled WireGuard private_key value into a shell command without validation or sanitization. Exploitation requires a valid administrator token in the JSON-RPC request, and injected shell syntax runs commands in the router application's context.

CVSS severity9.8
Critical
EPSS probability2.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in GL-iNet GL-AR300M16 firmware 4.3.11 allows remote authenticated users to execute arbitrary system commands. The wg-server set_config handler directly concatenates the user-controlled WireGuard private_key value into a shell command without validation or sanitization. Exploitation requires a valid administrator token in the JSON-RPC request, and injected shell syntax runs commands in the router application's context.

The record

CVE
CVE-2026-26793
Published
Mar 12, 2026
Updated
Mar 12, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-77, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059.004Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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