CVE-2026-102056 Juniper Networks Junos OS - Out-of-bounds Read

Juniper Networks Junos OS and Junos OS Evolved contain an out-of-bounds read vulnerability caused by improper handling of specific CFM messages in the cfmd process, letting unauthenticated adjacent-network attackers crash the daemon and disclose limited process memory, exploit requires network adjacency.

CVSS base score 7.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Out-of-bounds Read
Impact
Denial Of Service, Information Disclosure
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Published
14 October 2026
Updated
15 October 2026
Weakness
CWE-125

Vendor fix

Update to the latest Junos OS and Junos OS Evolved versions with the fix applied.

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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