Description
A Stack-based Buffer Overflow vulnerability in the authd process of Juniper Networks Junos OS allows an attacker able to influence a configured RADIUS server to cause authd to crash or execute code with root privileges via a malicious RADIUS response.
Published: 2026-10-14
Score: 8.7 High
EPSS: n/a
KEV: No
Impact: Remote Code Execution
Action: Patch Immediately
AI Analysis

Impact

A stack-based buffer overflow is present in the authd process of Juniper Networks Junos OS. When a configured RADIUS server sends a malicious response, the overflow can cause authd to crash or execute arbitrary code with root privileges. This results in a denial of authentication service or full privilege escalation on the affected device.

Affected Systems

Juniper Networks Junos OS releases 23.2R2-S7.7, 23.4R2-S8.13, 24.2R2-S5.5, 24.4R2-S5, 25.2R2-S2, 25.4R1-S3, 25.4R2, 26.2R1-S2, 26.2R2, 26.4R1, and all subsequent releases are affected. Devices running these versions with RADIUS authentication enabled are at risk.

Risk and Exploitability

The CVSS score of 8.7 classifies this as a high-severity vulnerability. No EPSS score is available, but the lack of a known workaround and the exploit requiring only a malicious RADIUS response make the risk significant. The vulnerability is not listed in CISA KEV, yet the impact level and the fact that the flaw is exploitable remotely through a trusted authentication path warrant immediate remediation.

Generated by OpenCVE AI on October 14, 2026 at 22:09 UTC.

Remediation

Vendor Solution

The following software releases have been updated to resolve this specific issue: Junos OS: 23.2R2-S7.7, 23.4R2-S8.13, 24.2R2-S5.5, 24.4R2-S5, 25.2R2-S2, 25.4R1-S3, 25.4R2, 26.2R1-S2, 26.2R2, 26.4R1, and all subsequent releases. Note: For Junos OS releases 23.2, 23.4, and 24.2, specific respins have been referenced. Previously published versions of these releases have been rebuilt to resolve the security vulnerabilities identified in this advisory.

Vendor Workaround

There are no known workarounds for this issue.

OpenCVE Recommended Actions

  • Update Junos OS to release 23.2R2‑S7.7 or any later release listed in the vendor advisory.
  • If a patch cannot be applied immediately, disable RADIUS authentication or disconnect the affected RADIUS server to eliminate the attack surface.
  • Ensure that only trusted RADIUS servers are configured and enforce strict authentication of RADIUS responses to prevent malicious data from reaching authd.

Generated by OpenCVE AI on October 14, 2026 at 22:09 UTC.

Tracking

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Advisories

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History

Wed, 14 Oct 2026 17:00:00 +0000

Type Values Removed Values Added
Description A Stack-based Buffer Overflow vulnerability in the authd process of Juniper Networks Junos OS allows an attacker able to influence a configured RADIUS server to cause authd to crash or execute code with root privileges via a malicious RADIUS response.
Title Junos OS: An attacker causes authd to crash when subscriber RADIUS authentication is used
Weaknesses CWE-121
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/V:C/RE:M'}

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: juniper

Published:

Updated: 2026-10-14T16:45:13.316Z

Reserved: 2026-09-28T17:33:49.410Z

Link: CVE-2026-102014

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-14T17:17:53.693

Modified: 2026-10-14T17:17:53.693

Link: CVE-2026-102014

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-14T22:15:08Z

Weaknesses
  • CWE-121

    Stack-based Buffer Overflow