CVE-2026-102174: CWE-121 Stack-based Buffer Overflow in Juniper Networks Junos OS
Description
CVE-2026-102174 is a high-severity stack-based buffer overflow vulnerability in the iked IKE key-management daemon of Juniper Networks Junos OS on the SRX Series. It allows an authenticated remote-access VPN client to execute code with root privileges or cause a denial of service through the remote-access VPN authentication and JIMS identity-publishing path. The vulnerability affects multiple Junos OS versions prior to specific patch releases.
CVSS v3.1
Score 8.8high
Affected software
Juniper Networks
Junos OS
pkg:rpm/juniper/junos-osRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability is a stack-based buffer overflow (CWE-121) in the iked daemon responsible for IKE key management in Juniper Networks Junos OS on SRX Series devices. An authenticated remote-access VPN client can exploit this flaw via the VPN authentication and JIMS identity-publishing path to execute arbitrary code with root privileges or cause a denial of service. The CVSS 3.1 score is 8.8, reflecting high impact on confidentiality, integrity, and availability. Multiple Junos OS versions are affected, with fixed versions starting from 23.2R2-S7.7, 23.4R2-S8.13, 24.2R2-S5.5, 24.4R2-S5, 25.2R2-S2, 25.4R1-S3, and 26.2R1-S2 respectively.
Potential Impact
Successful exploitation allows an authenticated remote-access VPN client to execute arbitrary code with root privileges or cause a denial of service on the affected Junos OS device. This compromises system confidentiality, integrity, and availability, potentially leading to full system compromise.
Mitigation Recommendations
Patch your Junos OS devices to versions at or beyond the following fixed releases: 23.2R2-S7.7, 23.4R2-S8.13, 24.2R2-S5.5, 24.4R2-S5, 25.2R2-S2, 25.4R1-S3, or 26.2R1-S2. These versions contain fixes for this vulnerability. No other mitigation or workaround information is provided. Check Juniper Networks advisories for the latest remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- juniper
- Date Reserved
- 2026-09-28T18:17:13.470Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6acfb66d2cdf04f6569794e6
Added to database: 10/14/2026, 17:05:49 UTC
Last enriched: 10/14/2026, 18:04:42 UTC
Last updated: 10/14/2026, 20:28:41 UTC
Views: 4
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