CVE-2026-26280

HighPublic PoC

Published: 19 February 2026

Published

19 February 2026

Modified

20 February 2026

KEV Added

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Patch

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CVSS Score 8.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0003 8.6th percentile

Risk Priority 17 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-26280 is a high-severity OS Command Injection (CWE-78) vulnerability in Systeminformation Systeminformation. Its CVSS base score is 8.4 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Unix Shell (T1059.004); ranked at the 8.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Threat & Defense at a Glance

What attackers do: exploitation maps to Unix Shell (T1059.004). What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-2 Flaw Remediation good match

prevent

Requires timely identification, reporting, and patching of the command injection flaw in systeminformation versions prior to 5.30.8, directly eliminating the vulnerability.

SI-10 Information Input Validation good match

prevent

Mandates validation of the user-controlled 'iface' parameter before passing it to si.wifiNetworks(), preventing unsanitized input from reaching the execSync command in the retry path.

AC-6 Least Privilege partial match

prevent

Enforces least privilege for the Node.js process, limiting the scope and impact of arbitrary command execution resulting from successful exploitation.

MITRE ATT&CK Enterprise TechniquesAI

T1059.004 Unix Shell Execution

Adversaries may abuse Unix shell commands and scripts for execution.

attack.mitre.org →

Why these techniques?

Command injection in wifiNetworks() directly enables arbitrary Unix shell command execution via unsanitized input to execSync('iwlist ${iface} scan').

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD Description

systeminformation is a System and OS information library for node.js. In versions prior to 5.30.8, a command injection vulnerability in the `wifiNetworks()` function allows an attacker to execute arbitrary OS commands via an unsanitized network interface parameter in the retry…

code path. In `lib/wifi.js`, the `wifiNetworks()` function sanitizes the `iface` parameter on the initial call (line 437). However, when the initial scan returns empty results, a `setTimeout` retry (lines 440-441) calls `getWifiNetworkListIw(iface)` with the **original unsanitized** `iface` value, which is passed directly to `execSync('iwlist ${iface} scan')`. Any application passing user-controlled input to `si.wifiNetworks()` is vulnerable to arbitrary command execution with the privileges of the Node.js process. Version 5.30.8 fixes the issue.

Deeper analysisAI

CVE-2026-26280 is a command injection vulnerability in the systeminformation library for Node.js, affecting versions prior to 5.30.8. The issue resides in the wifiNetworks() function within lib/wifi.js, where the network interface parameter (iface) is sanitized on the initial call (line 437). However, if the initial scan returns empty results, a setTimeout retry (lines 440-441) invokes getWifiNetworkListIw(iface) with the original unsanitized iface value, which is directly passed to execSync('iwlist ${iface} scan'). This allows arbitrary OS commands to be executed. The vulnerability is rated with a CVSS score of 8.4 (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) and is associated with CWE-78 (OS Command Injection).

A local attacker can exploit this vulnerability by providing malicious user-controlled input as the iface parameter to si.wifiNetworks() in any application using the library. No privileges are required (PR:N), and exploitation requires low complexity with local access (AV:L) but no user interaction (UI:N). Successful exploitation enables arbitrary command execution with the privileges of the Node.js process, potentially leading to high confidentiality, integrity, and availability impacts (C:H/I:H/A:H).

The GitHub security advisory (GHSA-9c88-49p5-5ggf) and the fixing commit (22242aa56188f2bffcbd7d265a11e1ebb808b460) confirm that upgrading to version 5.30.8 resolves the issue by ensuring proper sanitization in the retry path. Applications passing user-controlled input to si.wifiNetworks() should update immediately to mitigate the risk of command injection.