CVE-2026-101944: Junos OS and Junos OS Evolved: An attacker causes a routing protocol daemon denial of service when EVPN is used

Vulnerability summary

CVE-2026-101944 is a high (CVSS 8.7) Integer Overflow or Wraparound vulnerability in juniper networks junos os. EPSS estimates a 0.46% chance of exploitation in the next 30 days, higher than 38.8% of scored vulnerabilities.

Timeline

1. 14-10-2026
   PublishedVulnerability first disclosed.
2. 16-10-2026
   Last modifiedVulnerability information updated.

Description

An Integer Overflow or Wraparound vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an attacker to cause a denial of service via specially crafted EVPN route updates from an accepted EVPN BGP peer.

• CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.