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CVE-2026-57026

HIGH
7.5
CVSS 3.1
Description
An Improper Validation of Syntactic Correctness of Input vulnerability in the SIP plugin of Juniper Networks Junos OS on MX Series with SPC3 and SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).If the SIP ALG is enabled on an affected device, the processing of a malformed SIP invite packet will cause a flow processing daemon (flowd) crash and restart. This leads to a complete service outage until the system has automatically recovered. This issue affects Junos OS on MX Series with SPC3 and SRX Series: * all versions before 23.2R2-S7, * 23.4 versions before 23.4R2-S8, * 24.2 versions before 24.2R2-S5, * 24.4 versions before 24.4R2-S4, * 25.2 versions before 25.2R2, * 25.4 versions before 25.4R1-S2.

Metadata

CVE ID
CVE-2026-57026
State
PUBLISHED
Assigner
juniper
Reserved
2026-06-23 16:27 UTC
Published
2026-07-09 21:07 UTC
Last updated
2026-07-09 21:07 UTC
Primary CWE
CWE-1286
CWE-1286 Improper Validation of Syntactic Correctness of Inp…
Vendor / Product
Juniper Networks / Junos OS
Sources
cve.org  ·  NVD

Severity & Metrics

7.5 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products (1)
VendorProductPlatformVersions
Juniper Networks Junos OS SRX Series,MX Series with SPC3 0 < 23.2R2-S7, 23.4 < 23.4R2-S8, 24.2 < 24.2R2-S5, 24.4 < 24.4R2-S4 …
Weakness (CWE)
CWESourceDescription
CWE-1286 cna CWE-1286 Improper Validation of Syntactic Correctness of Input
CVSS scores (2)
ScoreSeverityVersionSourceVector
8.7 HIGH 4.0 cna CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M
7.5 HIGH 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References (1)
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