CVE WatchJul 13, 2026

CVE-2026-33801

An Improper Check for Unusual or Exceptional Conditions vulnerability in the routing protocol daemon (RPD) of Juniper Networks Junos OS and

CVSS

6.5

Medium

EPSS

0.3%

p20

KEV

—

Exploit Today

0-100

Published: Jul 9, 2026 · Last modified: Jul 13, 2026 · CWE-754

EPSS · 30d

0.3%EPSS · 30 days0.3%

2026-07-102026-07-21

Technical description

An Improper Check for Unusual or Exceptional Conditions vulnerability in the routing protocol daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker sending a specific BGP update over an established BGP session to cause a Denial-of-Service (DoS). Upon receipt of a specifically malformed non-inet/inet6 unicast BGP update, an RPD crash and restart is triggered, which will cause a complete service outage until routing has reconverged. The rpd crash occurs before the update can be readvertised, so there is no downstream propagation. This issue affects: * Junos OS versions 25.2 before 25.2R2; * Junos OS Evolved versions 25.2 before 25.2R2-EVO. This issue doesn't affect Junos OS versions before 25.2R1 nor Junos OS Evolved versions before 25.2R1-EVO.

Official references

supportportal.juniper.nethttps://supportportal.juniper.net/JSA110076

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