Critical severity · published Oct 14, 2026
CVE-2026-33792
Junos OS: SRX Series: An attacker causes remote code execution and denial of service when a GRE tunnel is configured
9.8
CVSS
0.6%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
JO
Junos OS · Juniper
before 23.2R2-S7.7; 23.4 before 23.4R2-S8.13; 24.2 before 24.2R2-S5.5; 24.4 before 24.4R2-S5; 25.2 before 25.2R2-S2; 25.4 before 25.4R1-S3; +1 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33792
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-33792
vendor-advisory
https://supportportal.juniper.net/JSA112186
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