CVE-2026-102177
7.6HighPublished 14 Oct 2026 · NVD status: Awaiting Analysis · AI triage by gemini-3.8-flash
- Attack vector
- Adjacent network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Impact
- High impact on availability
- Weakness
- CWE-787
Impact
Adjacent unauthenticated attackers can crash the routing protocol daemon (rpd), causing a denial of service and potential integrity or confidentiality compromise. They need adjacent network access to a device running IS-IS with link protection and backup-selection enabled.
Root cause
An out-of-bounds write flaw in rpd triggered during processing under specific IS-IS backup and protection configurations.
Affected systems
Versions not listed — check the vendor advisory.
CVSS v3.1 · CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Fix & remediation
Check advisory JSA112187 for patched Junos OS and Junos OS Evolved releases. If patching must wait, disable IS-IS link protection or backup-selection on affected interfaces.
AI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
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.