Stack-based Buffer Overflow in Juniper Networks Junos OS
CVE-2026-102049

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-2026-102049?

A stack-based buffer overflow vulnerability exists in the l2cpd process of Juniper Networks' Junos OS and Junos OS Evolved. This security flaw allows an adjacent unauthenticated attacker to exploit the vulnerability by sending specially crafted LLDP traffic over an interface configured with Unified Access Policy enabled. Successful exploitation can lead to denial of service or allow the attacker to execute arbitrary code with root privileges, significantly compromising the integrity and availability of the affected systems.

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:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.