CVE-2026-101983
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Stack-based Buffer Overflow in Juniper Junos OS and Junos OS Evolved

Publication date: 2026-10-14

Last updated on: 2026-10-15

Assigner: Juniper Networks, Inc.

Description
A Stack-based Buffer Overflow vulnerability in the httpd process of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network attacker to cause remote code execution and denial of service via a J-Web virtual-domain configured.

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Meta Information

Published
2026-10-14
Last Modified
2026-10-15
Generated
2026-11-08
AI Q&A
2026-10-15
EPSS Evaluated
2026-11-07
NVD
CVE-2026-101983
EUVD
EUVD-2026-101309

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

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Executive Summary

This is a Stack-based Buffer Overflow vulnerability in the httpd process of Juniper Networks Junos OS and Junos OS Evolved. It allows an unauthenticated network attacker to execute remote code and cause denial of service if a J-Web virtual-domain is configured.

Impact Analysis

An attacker could exploit this to run malicious code on your system, potentially taking control of devices running affected Junos OS versions. This could lead to data breaches, system outages, or unauthorized access to network resources.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, which may violate GDPR (data protection) or HIPAA (health data privacy) requirements. Organizations must address it to maintain compliance and avoid penalties.

Mitigation Strategies

Immediately update Junos OS and Junos OS Evolved to the latest patched versions as recommended by Juniper Networks. Disable J-Web virtual-domain if not in use and restrict access to trusted networks only.

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