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CVE-2026-57023

8.7 high SSVC exploitation: none Analyzed
NVD · CVE.org

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.

Fix

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 8.7 · juniperNVD modified 2026-10-25 15:10

Affected (CPE criteria) 30

  • cpe:2.3:o:juniper:junos:23.4:-:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.4:r1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.4:r1-s1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.4:r1-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:23.4:r2-s4:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.4:r2-s5:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.4:r2-s6:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:24.2:-:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:24.2:r1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:24.2:r1-s1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:24.2:r1-s2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:24.2:r2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:24.2:r2-s1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:24.2:r2-s2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:24.2:r2-s3:*:*:*:*:*:*
  • 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:24.4:r2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:24.4:r2-s1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:24.4:r2-s2:*:*:*:*:*:*
  • 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:*:*:*:*:*:*

References 1