--- title: "CVE-2026-33798: Juniper Networks Junos OS - Buffer Overflow" description: "Juniper Networks Junos OS and Junos OS Evolved on SRX Series contain a stack-based buffer overflow caused by improper handling in srxpfe, letting L2-adjacent attackers execute arbitrary code as root via high-availability fabric traffic, exploit requires L2 adjacency." url: https://panop.io/threat-heartbeat/CVE-2026-33798/ --- # CVE-2026-33798 Juniper Networks Junos OS - Buffer Overflow Juniper Networks Junos OS and Junos OS Evolved on SRX Series contain a stack-based buffer overflow caused by improper handling in srxpfe, letting L2-adjacent attackers execute arbitrary code as root via high-availability fabric traffic, exploit requires L2 adjacency. CVSS base score 8.8 /10 High CISA KEV Not listed Public exploit None known Authentication Not required [View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-33798) ## Details Type Buffer Overflow Impact Remote Code Execution, Privilege Escalation CVSS vector CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Published 14 October 2026 Updated 15 October 2026 Weakness [CWE-121](https://cwe.mitre.org/data/definitions/121.html) ## Vendor fix Update to the latest Junos OS and Junos OS Evolved versions. Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them. ## References - [https://nvd.nist.gov/vuln/detail/CVE-2026-33798](https://nvd.nist.gov/vuln/detail/CVE-2026-33798) - [https://supportportal.juniper.net/JSA112186](https://supportportal.juniper.net/JSA112186) [← All CVEs](https://panop.io/threat-heartbeat/) ## What this record can't tell you - Whether you run the affected software, and where - Whether an attacker can actually reach and exploit it - The misconfigurations that never get a CVE number - What it would cost the business, ranked into what to fix first Panop answers these inside your environment, for this CVE and every other finding. [Book a demo](https://panop.io/demo)