SB2026050813 - Remote denial of service in Junos OS Evolved on QFX5000 and PTX devices
Published: May 8, 2026
Security Bulletin ID
SB2026050813
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) Stack-based buffer overflow (CVE-ID: CVE-2025-59969)
CWE-ID: CWE-121 - Stack-based buffer overflow
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to stack-based buffer overflow in the advanced forwarding toolkit (evo-aftmand/evo-pfemand) when processing crafted multicast packets. A remote attacker can send crafted multicast packets to cause a denial of service.
Exposure requires the [ protocols mld ] or [ protocols pim ] configuration.
Remediation
Install update from vendor's website.