{"api_version":"1","generated_at":"2026-07-10T18:12:02+00:00","cve":"CVE-2026-57023","urls":{"html":"https://cve.report/CVE-2026-57023","api":"https://cve.report/api/cve/CVE-2026-57023.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-57023","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-57023"},"summary":{"title":"Junos OS: MX with SPC3, SRX Series: A specifically malformed TCP packet causes a flowd crash","description":"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).\n\nWhen 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.\n\n\n\nThis issue affects Junos OS on MX with SPC3, and SRX Series: \n\n\n\n  *  23.4 versions before 23.4R2-S7, \n  *  24.2 versions before 24.2R2-S4, \n  *  24.4 versions before 24.4R2-S3,\n  *  25.2 versions before 25.2R2.\n\n\n\n\nThis issue does not affect releases before 23.4R1.","state":"PUBLISHED","assigner":"juniper","published_at":"2026-07-09 22:17:07","updated_at":"2026-07-10 17:49:57"},"problem_types":["CWE-1284","CWE-1284 CWE-1284 Improper Validation of Specified Quantity in 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This causes a complete service outage until the system has automatically recovered.\n\n\n\nThis issue affects Junos OS on MX with SPC3, and SRX Series: \n\n\n\n  *  23.4 versions before 23.4R2-S7, \n  *  24.2 versions before 24.2R2-S4, \n  *  24.4 versions before 24.4R2-S3,\n  *  25.2 versions before 25.2R2.\n\n\n\n\nThis issue does not affect releases before 23.4R1.","Type":"Description","Title":"Junos OS: MX with SPC3, SRX Series: A specifically malformed TCP"}]}}}