SB2026050816 - Remote denial of service in Junos OS and Junos OS Evolved
Published: May 8, 2026
Security Bulletin ID
SB2026050816
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Input validation error (CVE-ID: CVE-2026-33797)
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper input validation in the BGP session handling logic when processing a specific genuine BGP packet in an already established BGP session. A remote attacker can send a specific genuine BGP packet to cause a denial of service.
Repeated packet transmission can sustain the denial of service. Both eBGP and iBGP are affected, and the issue applies to both IPv4 and IPv6.
Remediation
Install update from vendor's website.