CVE-2026-102020
7.5HighPublished 14 Oct 2026 · NVD status: Awaiting Analysis · AI triage by gemini-3.8-flash
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Impact
- High impact on availability
- Weakness
- CWE-617
Impact
A network-based attacker with an established BGP session can crash the routing protocol daemon (rpd), causing a complete denial of service across routing. They only need access to send malformed BGP-LS routing updates to the device.
Root cause
The routing protocol daemon (rpd) fails to handle specific BGP-LS updates, triggering an assertion failure that terminates the process.
Affected systems
Juniper Networks Junos OS and Junos OS Evolved; exact versions are not listed in the advisory summary.
CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Fix & remediation
Check advisory JSA112187 for resolved releases and update Junos OS/Junos OS Evolved. As an interim workaround, disable BGP-LS peering or apply inbound routing policies to reject unexpected BGP-LS updates from untrusted peers.
AI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
A Reachable Assertion vulnerability in the rpd process of Juniper Networks Junos OS and Junos OS Evolved allows an authenticated network-based attacker to cause a denial of service via BGP-LS routing updates.