Out-of-Bounds Write Vulnerability in Junos OS by Juniper Networks
CVE-2026-101976

8.7HIGH

Key Information:

Vendor

Juniper Networks
Status
Junos Os
Junos Os Evolved
Vendor
CVE Published:
14 October 2026

Badges

👾 Exploit Exists

What is CVE-2026-101976?

An Out-of-bounds Write vulnerability exists in the routing protocol daemon (rpd) of Junos OS and Junos OS Evolved, allowing an unauthenticated eBGP peer that has not negotiated four-octet AS capabilities to send a malformed BGP update. This issue could lead to a Denial-of-Service (DoS) condition, impacting the availability of the affected network devices.

Affected Version(s)

Junos OS 0 < 23.2R2-S7.7

Junos OS 23.4 < 23.4R2-S8.13

Junos OS 24.2 < 24.2R2-S5.5

References

https://supportportal.juniper.net/JSA112187
vendor-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.