CVE-2026-33795 vulnerability in Juniper Networks Products
Published on October 14, 2026
Junos OS and Junos OS Evolved: An attacker causes a routing-daemon crash when BGP Prefix-SID routes are re-advertised
A Numeric Truncation Error vulnerability in the rpd process of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network-based attacker to cause a denial of service via a BGP Prefix-SID route advertisement that is subsequently re-advertised.
This issue does not affect versions of Junos OS prior to 20.4R1.
This issue does not affect versions of Junos OS Evolved prior to 20.4R1-EVO
Vulnerability Analysis
CVE-2026-33795 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
Numeric Truncation Error
Truncation errors occur when a primitive is cast to a primitive of a smaller size and data is lost in the conversion. When a primitive is cast to a smaller primitive, the high order bits of the large value are lost in the conversion, potentially resulting in an unexpected value that is not equal to the original value. This value may be required as an index into a buffer, a loop iterator, or simply necessary state data. In any case, the value cannot be trusted and the system will be in an undefined state. While this method may be employed viably to isolate the low bits of a value, this usage is rare, and truncation usually implies that an implementation error has occurred.
Products Associated with CVE-2026-33795
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Affected Versions
Juniper Networks Junos OS:- Before 23.2R2-S7.7 is affected.
- Version 23.4 and below 23.4R2-S8.13 is affected.
- Version 24.2 and below 24.2R2-S5.5 is affected.
- Version 24.4 and below 24.4R2-S5 is affected.
- Version 25.2 and below 25.2R2-S2 is affected.
- Version 25.4 and below 25.4R1-S3 is affected.
- Version 26.2 and below 26.2R1-S2 is affected.
- Before 20.4R1 is unaffected.
- Before 23.2R2-S7.7-EVO is affected.
- Version 23.4 and below 23.4R2-S8.11-EVO is affected.
- Version 24.2 and below 24.2R2-S5.6-EVO is affected.
- Version 24.4 and below 24.4R2-S5-EVO is affected.
- Version 25.2 and below 25.2R2-S2-EVO is affected.
- Version 25.4 and below 25.4R1-S3-EVO is affected.
- Version 26.2 and below 26.2R1-S2-EVO is affected.
- Version 23.4X100 is affected.
- Version 25.2X100 and below 25.2X100-D35-EVO is affected.
- Version 25.4X300 and below 25.4X300-D40-EVO is affected.
- Before 20.4R1-EVO is unaffected.