CVE-2026-101950: CWE-122 Heap-based Buffer Overflow in Juniper Networks Junos OS
Description
CVE-2026-101950 is a critical heap-based buffer overflow vulnerability in the SVR component of Juniper Networks Junos OS on SRX Series devices. It allows an unauthenticated network attacker to cause denial of service and potentially compromise confidentiality and integrity by sending malformed IPv4 packets to an interface configured for Secure Vector Routing. The vulnerability affects multiple Junos OS versions prior to specific fixed releases. The CVSS score is 9.8, indicating a high severity with network attack vector and no privileges required.
CVSS v3.1
Score 9.8critical
Affected software
Juniper Networks
Junos OS
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability is a heap-based buffer overflow in the SVR component of Juniper Networks Junos OS running on SRX Series devices. An unauthenticated attacker can exploit this by sending malformed IPv4 packets to an interface configured for Secure Vector Routing, leading to denial of service and potential compromise of confidentiality and integrity. The vulnerability affects multiple versions of Junos OS prior to fixed releases identified by the vendor. The CVSS 3.1 score is 9.8, reflecting critical impact with full confidentiality, integrity, and availability loss possible.
Potential Impact
Successful exploitation can cause denial of service and potentially allow attackers to compromise the confidentiality and integrity of affected devices. The vulnerability requires no authentication and can be triggered remotely over the network via malformed IPv4 packets targeting interfaces configured for Secure Vector Routing.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the input data. Until a patch is available, restrict network access to interfaces configured for Secure Vector Routing and monitor for suspicious malformed IPv4 packets targeting these interfaces.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- juniper
- Date Reserved
- 2026-09-28T16:28:35.624Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6acfb2f82cdf04f656962355
Added to database: 10/14/2026, 16:51:04 UTC
Last enriched: 10/14/2026, 17:05:11 UTC
Last updated: 10/14/2026, 22:48:33 UTC
Views: 8
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