{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-0203", "assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "state": "PUBLISHED", "assignerShortName": "juniper", "dateReserved": "2025-10-29T20:57:34.631Z", "datePublished": "2026-01-15T20:17:24.552Z", "dateUpdated": "2026-01-15T21:11:32.119Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "Junos OS", "vendor": "Juniper Networks", "versions": [{"lessThan": "21.2R3-S9", "status": "affected", "version": "0", "versionType": "semver"}, {"lessThan": "21.4R3-S10", "status": "affected", "version": "21.4", "versionType": "semver"}, {"lessThan": "22.2R3-S7", "status": "affected", "version": "22.2", "versionType": "semver"}, {"lessThan": "22.3R3-S4", "status": "affected", "version": "22.3", "versionType": "semver"}, {"lessThan": "22.4R3-S5", "status": "affected", "version": "22.4", "versionType": "semver"}, {"lessThan": "23.2R2-S3", "status": "affected", "version": "23.2", "versionType": "semver"}, {"lessThan": "23.4R2-S3", "status": "affected", "version": "23.4", "versionType": "semver"}, {"lessThan": "24.2R1-S2, 24.2R2", "status": "affected", "version": "24.2", "versionType": "semver"}]}], "datePublic": "2026-01-14T17:00:00.000Z", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "An Improper Handling of Exceptional Conditions vulnerability in packet processing of Juniper Networks Junos OS allows an unauthenticated, network-adjacent attacker sending a specifically malformed ICMP packet to cause an FPC to crash and restart, resulting in a Denial of Service (DoS).<br><br>\n\n<span style=\"background-color: rgb(255, 255, 255);\">When an ICMP packet is received with a specifically malformed IP header value, the FPC receiving the packet crashes and restarts. 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