Paper/Archive/CVE-2026-33792

CVE-2026-33792

Juniper Networks Junos OS — Junos OS: SRX Series: An attacker causes remote code execution and denial of service when a GRE tunnel is configured

EPSS 0.6%CVSS 9.8

critical.is priorityof 100

CVSS 9.8 (CNA)9.8 / 10 × 3029.4 Not in CISA KEV+300.0 EPSS percentile 49.1.491 × 209.8 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

A Stack-based Buffer Overflow vulnerability in the srxpfe process of Juniper Networks Junos OS on SRX Series allows an unauthenticated network attacker to execute code as root or cause a denial of service via a crafted packet received on a configured GRE tunnel.

Affected

ProductAffectedFixed inSource

Junos OS< 23.2R2-S7.723.2R2-S7.7CNA

Junos OS23.4 – < 23.4R2-S8.1323.4R2-S8.13CNA

Junos OS24.2 – < 24.2R2-S5.524.2R2-S5.5CNA

Junos OS24.4 – < 24.4R2-S524.4R2-S5CNA

Junos OS25.2 – < 25.2R2-S225.2R2-S2CNA

Junos OS25.4 – < 25.4R1-S325.4R1-S3CNA

Junos OS26.2 – < 26.2R1-S226.2R1-S2CNA

Scores by source

juniper (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

juniper (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/V:C/RE:M

CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

advisorysupportportal.juniper.net/JSA112186