CVE-2026-102177
Junos OS and Junos OS Evolved: An out-of-bounds write causes an rpd crash when IS-IS backup selection is used
CVSS Score
7.6
EPSS Score
0.0%
EPSS Percentile
0th
An Out-of-bounds Write vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated attacker to cause a denial of service when IS-IS link protection and backup-selection are configured.
| CWE | CWE-787 |
| Vendor | juniper networks |
| Product | junos os |
| Published | Oct 14, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
High
Affected Versions
Juniper Networks / Junos OS
0 < 23.2R2-S7.7 23.4 < 23.4R2-S8.13 24.2 < 24.2R2-S5.5 24.4 < 24.4R2-S5 25.2 < 25.2R2-S2 25.4 < 25.4R1-S3 26.2 < 26.2R1-S2
Juniper Networks / Junos OS Evolved
0 < 23.2R2-S7.7-EVO 23.4 < 23.4R2-S8.11-EVO 24.2 < 24.2R2-S5.6-EVO 24.4 < 24.4R2-S5-EVO 25.2 < 25.2R2-S2-EVO 25.4 < 25.4R1-S3-EVO 26.2 < 26.2R1-S2-EVO 23.4X100 25.2X100 < 25.2X100-D35-EVO 25.4X300 < 25.4X300-D40-EVO