CVE-2026-33792 Juniper Networks Junos OS - Buffer Overflow

Juniper Networks Junos OS on SRX Series contains a stack-based buffer overflow caused by improper handling of crafted packets in the srxpfe process on GRE tunnels, letting unauthenticated network attackers execute code as root or cause denial of service.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Remote Code Execution, Denial Of Service
CVSS vector
CVSS:3.1/AV:N/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

Vendor fix

Update to the latest Junos OS version with the fix applied.

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

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