Stack-based Buffer Overflow in Junos OS by Juniper Networks
CVE-2026-101983

9.3CRITICAL

Key Information:

Vendor

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

Badges

👾 Exploit Exists

What is CVE-2026-101983?

A stack-based buffer overflow vulnerability in the HTTP daemon of Juniper Networks' Junos OS and Junos OS Evolved can be exploited by an unauthenticated network attacker, potentially leading to remote code execution and denial of service. This flaw arises when the J-Web virtual-domain is configured improperly, highlighting the need for vigilant configuration and security practices to mitigate such risks.

Affected Version(s)

Junos OS 23.4 < 23.4R2-S8.13

Junos OS 24.2 < 24.2R2-S5.5

Junos OS 24.4 < 24.4R2-S5

References

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

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
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

.