Stack-based Buffer Overflow in Junos OS and Junos OS Evolved
CVE-2026-102050

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-2026-102050?

A stack-based buffer overflow vulnerability exists in the l2cpd daemon of Juniper Networks' Junos OS and Junos OS Evolved. This flaw enables unauthenticated adjacent attackers to initiate a denial of service by sending specially crafted LLDP packets to an interface configured for LLDP. The repeated triggering of this vulnerability may lead to significant disruptions in LLDP and other Layer 2 control protocols, affecting overall network performance and reliability.

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

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