NVD

CVE-2026-57026 Detail

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.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

Nist CVSS score does not match with CNA score

CNA: Juniper Networks, Inc.

CVSS-B 8.7 HIGH

Vector: 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

CVSS 3.x Severity and Vector Strings:

CNA: Juniper Networks, Inc.

Base Score: 7.5 HIGH

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://supportportal.juniper.net/JSA110086	Juniper Networks, Inc.	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-1286	Improper Validation of Syntactic Correctness of Input	Juniper Networks, Inc.

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Change History

3 change records found show changes

Initial Analysis by NIST 7/14/2026 11:03:23 AM

Action

Type

Old Value

New Value

Added

CPE Configuration

Record truncated, showing 2048 of 3957 characters.
View Entire Change Record

AND
     OR
          *cpe:2.3:o:juniper:junos:23.2:r1:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:23.2:r1-s1:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:23.2:r1-s2:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:23.2:-:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:23.4:r1:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:23.4:-:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:23.4:r1-s1:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:23.2:r2:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:24.2:-:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:24.2:r1:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:23.4:r1-s2:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:23.2:r2-s1:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:23.2:r2-s2:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:23.4:r2:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:23.4:r2-s1:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:23.4:r2-s2:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:23.4:r2-s3:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:24.2:r1-s1:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:24.2:r2:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:23.2:r2-s3:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:23.2:r2-s4:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:23.4:r2-s4:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:24.2:r1-s2:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:24.4:-:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:24.4:r1:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:24.4:r1-s2:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:24.4:r1-s3:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:24.2:r2-s1:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:24.4:r2:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:23.4:r2-s5:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:24.2:r2-s2:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:24.4:r2-s1:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:25.2:-:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:25.2:r1:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:25.2:r1-s1:*:*:*:*:*:*
          *cpe:2.3:o:juniper:junos:25.2:r1-s2:*:*:*:*

Added

Reference Type

Juniper Networks, Inc.: https://supportportal.juniper.net/JSA110086 Types: Vendor Advisory

New CVE Received from Juniper Networks, Inc. 7/09/2026 6:17:07 PM

Action	Type	New Value
Added	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.
Added	CVSS V4.0	AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:X/RE:M/U:X
Added	CVSS V3.1	AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Added	CWE	CWE-1286
Added	Reference	https://supportportal.juniper.net/JSA110086
Added	Affected	[{"vendor":"Juniper Networks","product":"Junos OS","defaultStatus":"unaffected","platforms":["SRX Series","MX Series with SPC3"],"versions":[{"version":"0","lessThan":"23.2R2-S7","versionType":"custom","status":"affected"},{"version":"23.4","lessThan":"23.4R2-S8","versionType":"custom","status":"affected"},{"version":"24.2","lessThan":"24.2R2-S5","versionType":"custom","status":"affected"},{"version":"24.4","lessThan":"24.4R2-S4","versionType":"custom","status":"affected"},{"version":"25.2","lessThan":"25.2R2","versionType":"custom","status":"affected"},{"version":"25.4","lessThan":"25.4R1-S2","versionType":"custom","status":"affected"}]}]

Quick Info

CVE Dictionary Entry:
CVE-2026-57026
NVD Published Date:
07/09/2026
NVD Last Modified:
07/14/2026
Source:
Juniper Networks, Inc.

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Information Technology Laboratory

National Vulnerability Database