CVE-2026-33792 PUBLISHED

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

Assigner: juniper
Reserved: 23.03.2026 Published: 14.10.2026 Updated: 15.10.2026

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.

Metrics

CVSS Vector: CVSS: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
CVSS Score: 9.3

Product Status

Vendor Juniper Networks
Product Junos OS
Versions Default: unaffected
  • affected from 0 to 23.2R2-S7.7 (excl.)
  • affected from 23.4 to 23.4R2-S8.13 (excl.)
  • affected from 24.2 to 24.2R2-S5.5 (excl.)
  • affected from 24.4 to 24.4R2-S5 (excl.)
  • affected from 25.2 to 25.2R2-S2 (excl.)
  • affected from 25.4 to 25.4R1-S3 (excl.)
  • affected from 26.2 to 26.2R1-S2 (excl.)

Exploits

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

Workarounds

There are no known workarounds for this issue.

Solutions

The following software releases have been updated to resolve this specific issue:

Junos OS: 23.2R2-S7.7, 23.4R2-S8.13, 24.2R2-S5.5, 24.4R2-S5, 25.2R2-S2, 25.4R1-S3, 25.4R2, 26.2R1-S2, 26.2R2, 26.4R1, and all subsequent releases.

Note: For Junos OS releases 23.2, 23.4, and 24.2, specific respins have been referenced. Previously published versions of these releases have been rebuilt to resolve the security vulnerabilities identified in this advisory.

References

Problem Types

  • CWE-121 Stack-based Buffer Overflow CWE