CVE-2026-57023

EPSS 0.33%
Veröffentlicht 09.07.2026 21:06:34
Zuletzt bearbeitet 14.07.2026 15:19:42
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Junos OS: MX with SPC3, SRX Series: A specifically malformed TCP packet causes a flowd crash

An Improper Validation of Specified Quantity in Input vulnerability in the TCP proxy plugin of Juniper Networks Junos OS on MX Series with SPC3, and SRX Series allows an unauthenticated, network-based attacker to cause a complete Denial of Service (DoS).

When TCP proxy is engaged in a flow session, to support ALGs, Advanced Anti-Malware, ICAP or UTM, a TCP packet with specifically malformed TCP header will cause flow processing daemon (flowd) to crash and restart. This causes a complete service outage until the system has automatically recovered.



This issue affects Junos OS on MX with SPC3, and SRX Series: 



  *  23.4 versions before 23.4R2-S7, 
  *  24.2 versions before 24.2R2-S4, 
  *  24.4 versions before 24.4R2-S3,
  *  25.2 versions before 25.2R2.




This issue does not affect releases before 23.4R1.

Betroffene Produkte Warnungen 0 Metriken 3 CWE 1 Referenzen 4

NVD 30 VulnDex Vulnerability Enrichment 1

Daten sind bereitgestellt durch National Vulnerability Database (NVD)

Juniper ≫ Junos Version 23.4 Update -

   Juniper ≫ Mx-spc3 Version -
   Juniper ≫ Mx240 Version -
   Juniper ≫ Mx480 Version -
   Juniper ≫ Mx960 Version -
   Juniper ≫ Srx1500 Version -
   Juniper ≫ Srx1600 Version -
   Juniper ≫ Srx2300 Version -
   Juniper ≫ Srx300 Version -
   Juniper ≫ Srx320 Version -
   Juniper ≫ Srx340 Version -
   Juniper ≫ Srx345 Version -
   Juniper ≫ Srx380 Version -
   Juniper ≫ Srx400 Version -
   Juniper ≫ Srx4100 Version -
   Juniper ≫ Srx4120 Version -
   Juniper ≫ Srx4200 Version -
   Juniper ≫ Srx4300 Version -
   Juniper ≫ Srx440 Version -
   Juniper ≫ Srx4600 Version -
   Juniper ≫ Srx4700 Version -
   Juniper ≫ Srx5400 Version -
   Juniper ≫ Srx5600 Version -
   Juniper ≫ Srx5800 Version -

Juniper ≫ Junos Version 23.4 Update r1

Juniper ≫ Junos Version 23.4 Update r1-s1

Juniper ≫ Junos Version 23.4 Update r1-s2

Juniper ≫ Junos Version 23.4 Update r2

Juniper ≫ Junos Version 23.4 Update r2-s1

Juniper ≫ Junos Version 23.4 Update r2-s2

Juniper ≫ Junos Version 23.4 Update r2-s3

Juniper ≫ Junos Version 23.4 Update r2-s4

Juniper ≫ Junos Version 23.4 Update r2-s5

Juniper ≫ Junos Version 23.4 Update r2-s6

Juniper ≫ Junos Version 24.2 Update -

Juniper ≫ Junos Version 24.2 Update r1

Juniper ≫ Junos Version 24.2 Update r1-s1

Juniper ≫ Junos Version 24.2 Update r1-s2

Juniper ≫ Junos Version 24.2 Update r2

Juniper ≫ Junos Version 24.2 Update r2-s1

Juniper ≫ Junos Version 24.2 Update r2-s2

Juniper ≫ Junos Version 24.2 Update r2-s3

Juniper ≫ Junos Version 24.4 Update -

Juniper ≫ Junos Version 24.4 Update r1

Juniper ≫ Junos Version 24.4 Update r1-s2

Juniper ≫ Junos Version 24.4 Update r1-s3

Juniper ≫ Junos Version 24.4 Update r2

Juniper ≫ Junos Version 24.4 Update r2-s1

Juniper ≫ Junos Version 24.4 Update r2-s2

Juniper ≫ Junos Version 25.2 Update -

Juniper ≫ Junos Version 25.2 Update r1

Juniper ≫ Junos Version 25.2 Update r1-s1

Juniper ≫ Junos Version 25.2 Update r1-s2

VulnDex Vulnerability Enrichment

Diese Information steht angemeldeten Benutzern zur Verfügung.

Zu dieser CVE wurde keine Warnung gefunden.

EPSS Metriken
Typ	Quelle	Score	Percentile
EPSS	FIRST.org	0.33%	0.255

CVSS Metriken
Quelle	Base Score	Exploit Score	Impact Score	Vector String
Juniper	8.7	0	0	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/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
Juniper	7.5	3.9	3.6	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-1284 Improper Validation of Specified Quantity in Input

The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.

https://supportportal.juniper.net/JSA110083

Vendor Advisory

https://nvd.nist.gov/vuln/detail/CVE-2026-57023

CVE Source (NVD)

https://cveawg.mitre.org/api/cve/CVE-2026-57023

CVE Source (JSON)

https://euvd.enisa.europa.eu/vulnerability/CVE-2026-57023

EUVD

Team-orientierte Vulnerability Management Plattform

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CVE-2026-57023