CVE-2026-101927 Juniper Networks Junos OS - Buffer Overflow

Juniper Networks Junos OS and Junos OS Evolved contain a heap-based buffer overflow caused by crafted IPC event messages in eventd, letting unprivileged local attackers cause denial of service or escalate privileges to root.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Denial Of Service, Privilege Escalation
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
14 October 2026
Updated
15 October 2026
Weakness
CWE-122

Vendor fix

Update to the latest Junos OS and Junos OS Evolved versions.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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