CVE-2026-101927: CWE-122 Heap-based Buffer Overflow in Juniper Networks Junos OS
Description
CVE-2026-101927 is a heap-based buffer overflow vulnerability in the eventd component of Juniper Networks Junos OS and Junos OS Evolved across multiple platform versions. It allows an unprivileged local attacker to cause denial of service or escalate privileges to root by sending crafted IPC event messages. The vulnerability has a high severity with a CVSS score of 7.8. Multiple versions of Junos OS and Junos OS Evolved are affected, including various release branches prior to specific patch releases. No explicit patch links are provided, and no known exploits are reported in the wild.
CVSS v3.1
Score 7.8high
Affected software
Juniper Networks
Junos OS
Juniper Networks
Junos OS Evolved
pkg:github/juniper-networks/junos-ospkg:github/juniper-networks/junos-os-evolvedRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-101927) involves a heap-based buffer overflow in the eventd process of Juniper Networks Junos OS and Junos OS Evolved. An unprivileged local attacker can exploit this flaw by crafting IPC event messages that trigger the overflow, potentially causing a denial of service or escalating privileges to root. The issue affects a broad range of versions across multiple release branches, as detailed by the affectedVersions list. The CVSS 3.1 vector indicates low attack complexity, low privileges required, no user interaction, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation can lead to denial of service or full privilege escalation to root by an unprivileged local attacker. This compromises system confidentiality, integrity, and availability, potentially allowing complete control over the affected device.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official patch links are provided, users should monitor Juniper Networks advisories for updates and apply any official fixes once available. Until patched, restrict local access to trusted users only to mitigate risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- juniper
- Date Reserved
- 2026-09-28T16:12:58.633Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6acfb66e2cdf04f6569794f3
Added to database: 10/14/2026, 17:05:50 UTC
Last enriched: 10/14/2026, 17:50:04 UTC
Last updated: 10/14/2026, 20:28:25 UTC
Views: 4
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