What is the CVSS score of CVE-2026-30874?

CVE-2026-30874 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of Openwrt are affected by CVE-2026-30874?

Organizations using versions face notable risk from CVE-2026-30874 rated CVSS 7.8. Exploitation could compromise the security of affected deployments.

How to fix or mitigate CVE-2026-30874?

Within 7 days: Identify all affected systems running versions and apply vendor patches promptly. Monitor vendor channels for patch availability.

Openwrt CVE-2026-30874

HIGH

Partial String Comparison (CWE-187)

2026-03-19 GitHub_M

Privilege Escalation Openwrt

7.8

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

7.8 HIGH

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

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 19, 2026 - 23:00 vuln.today

CVE Published

Mar 19, 2026 - 22:36 nvd

HIGH 7.8

DescriptionGitHub Advisory

OpenWrt Project is a Linux operating system targeting embedded devices. In versions prior to 24.10.6, a vulnerability in the hotplug_call function allows an attacker to bypass environment variable filtering and inject an arbitrary PATH variable, potentially leading to privilege escalation. The function is intended to filter out sensitive environment variables like PATH when executing hotplug scripts in /etc/hotplug.d, but a bug using strcmp instead of strncmp causes the filter to compare the full environment string (e.g., PATH=/some/value) against the literal "PATH", so the match always fails. As a result, the PATH variable is never excluded, enabling an attacker to control which binaries are executed by procd-invoked scripts running with elevated privileges. This issue has been fixed in version 24.10.6.

AnalysisAI

OpenWrt versions prior to 24.10.6 allow local attackers with limited privileges to inject a malicious PATH environment variable into hotplug scripts due to improper filtering in the hotplug_call function, enabling execution of arbitrary binaries with elevated privileges. The vulnerability stems from a strcmp/strncmp logic error that fails to properly exclude the PATH variable when executing scripts in /etc/hotplug.d, resulting in local privilege escalation. No patch is currently available.

Technical ContextAI

Privilege escalation allows a low-privileged user or process to gain elevated permissions beyond what was originally authorized.

RemediationAI

Apply the principle of least privilege. Keep systems patched. Monitor for suspicious privilege changes. Use mandatory access controls (SELinux, AppArmor).