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CVE-2026-101976

Junos OS and Junos OS Evolved: In a non-4byte-AS scenario a specific BGP update causes an rpd crash

HIGH
7.5
CVSS Score
Published: October 14, 2026 at 05:16 PM UTC
Updated: October 15, 2026 at 04:23 PM UTC
2 products affected across 1 vendorJunosJunos OS Evolved

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Severity
HIGH7.5
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

Description

An Out-of-bounds Write vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an eBGP peer which has not negotiated four-octet-AS capability sending a specifically malformed BGP update to cause a Denial-of-Service (DoS).

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://supportportal.juniper.net/JSA112187

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHjuniper
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-787

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