CVE-2026-101950 Juniper Networks Junos OS - Buffer Overflow

Juniper Networks Junos OS on SRX Series contains a heap-based buffer overflow caused by malformed IPv4 packets in the SVR component, letting unauthenticated network attackers cause denial of service and compromise confidentiality and integrity, exploit requires network access to an interface configured for Secure Vector Routing.

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
Denial Of Service, Information Disclosure, Data Tampering
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-122

Vendor fix

Update to the latest version of Junos OS on SRX Series.

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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