{"id":"CVE-2026-33783","state":"PUBLISHED","title":"Junos OS Evolved: PTX Series: If SRTE tunnels provisioned via PCEP are present and specific gRPC queries are received evo-aftmand crashes","description":"A Function Call With Incorrect Argument Type vulnerability in the sensor interface of Juniper Networks Junos OS Evolved on PTX Series allows a network-based, authenticated attacker with low privileges to cause a complete Denial of Service (DoS).\n\n\nIf colored SRTE policy tunnels are provisioned via PCEP, and gRPC is used to monitor traffic in these tunnels, evo-aftmand crashes and doesn't restart which leads to a complete and persistent service impact. The system has to be manually restarted to recover. The issue is seen only when the Originator ASN field in PCEP contains a value larger than 65,535 (32-bit ASN). The issue is not reproducible when SRTE policy tunnels are statically configured.\n\n\nThis issue affects Junos OS Evolved on PTX Series: \n\n\n\n  *  all versions before 22.4R3-S9-EVO,\n  *  23.2 versions before 23.2R2-S6-EVO,\n  *  23.4 versions before 23.4R2-S7-EVO,\n  *  24.2 versions before 24.2R2-S4-EVO,\n  *  24.4 versions before 24.4R2-S2-EVO,\n  *  25.2 versions before 25.2R1-S2-EVO, 25.2R2-EVO.","publishedAt":"2026-04-09T21:36:13.503Z","updatedAt":"2026-04-13T18:06:19.144Z","severity":{"score":7.1,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:U/RE:M","source":"juniper"},"assigner":"juniper","products":["Juniper Networks Junos OS Evolved"],"affected":[{"vendor":"Juniper Networks","product":"Junos OS Evolved","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"22.4R3-S9-EVO","versionType":"semver"},{"version":"23.2","status":"affected","lessThan":"23.2R2-S6-EVO","versionType":"semver"},{"version":"23.4","status":"affected","lessThan":"23.4R2-S7-EVO","versionType":"semver"},{"version":"24.2","status":"affected","lessThan":"24.2R2-S4-EVO","versionType":"semver"},{"version":"24.4","status":"affected","lessThan":"24.4R2-S2-EVO","versionType":"semver"},{"version":"25.2","status":"affected","lessThan":"25.2R1-S2-EVO, 25.2R2-EVO","versionType":"semver"}],"platforms":["PTX Series"]}],"references":["https://kb.juniper.net/JSA107870"],"weaknesses":["CWE-686"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/33xxx/CVE-2026-33783.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-33783","state":"PUBLISHED","datePublished":"2026-04-09T21:36:13.503Z","dateUpdated":"2026-04-13T18:06:19.144Z","assignerShortName":"juniper","assignerOrgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateReserved":"2026-03-23T19:46:13.669Z"},"containers":{"cna":{"title":"Junos OS Evolved: PTX Series: If SRTE tunnels provisioned via PCEP are present and specific gRPC queries are received evo-aftmand crashes","descriptions":[{"lang":"en","value":"A Function Call With Incorrect Argument Type vulnerability in the sensor interface of Juniper Networks Junos OS Evolved on PTX Series allows a network-based, authenticated attacker with low privileges to cause a complete Denial of Service (DoS).\n\n\nIf colored SRTE policy tunnels are provisioned via PCEP, and gRPC is used to monitor traffic in these tunnels, evo-aftmand crashes and doesn't restart which leads to a complete and persistent service impact. The system has to be manually restarted to recover. The issue is seen only when the Originator ASN field in PCEP contains a value larger than 65,535 (32-bit ASN). The issue is not reproducible when SRTE policy tunnels are statically configured.\n\n\nThis issue affects Junos OS Evolved on PTX Series: \n\n\n\n  *  all versions before 22.4R3-S9-EVO,\n  *  23.2 versions before 23.2R2-S6-EVO,\n  *  23.4 versions before 23.4R2-S7-EVO,\n  *  24.2 versions before 24.2R2-S4-EVO,\n  *  24.4 versions before 24.4R2-S2-EVO,\n  *  25.2 versions before 25.2R1-S2-EVO, 25.2R2-EVO."}],"affected":[{"vendor":"Juniper Networks","product":"Junos OS Evolved","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"22.4R3-S9-EVO","versionType":"semver"},{"version":"23.2","status":"affected","lessThan":"23.2R2-S6-EVO","versionType":"semver"},{"version":"23.4","status":"affected","lessThan":"23.4R2-S7-EVO","versionType":"semver"},{"version":"24.2","status":"affected","lessThan":"24.2R2-S4-EVO","versionType":"semver"},{"version":"24.4","status":"affected","lessThan":"24.4R2-S2-EVO","versionType":"semver"},{"version":"25.2","status":"affected","lessThan":"25.2R1-S2-EVO, 25.2R2-EVO","versionType":"semver"}],"platforms":["PTX Series"]}],"references":[{"url":"https://kb.juniper.net/JSA107870","tags":["vendor-advisory"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]},{"cvssV4_0":{"Automatable":"YES","Recovery":"USER","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":7.1,"baseSeverity":"HIGH","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:U/RE:M","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"MODERATE"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-686","description":"CWE-686 Function Call With Incorrect Argument Type","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"juniper","orgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateUpdated":"2026-04-09T21:36:13.503Z"},"configurations":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"To be exposed to this issue a device needs to be configured with SR specific telemetry statistics:<br><br><tt>[ protocols source-packet-routing telemetry statistics per-source per-segment-list ]</tt>"}],"value":"To be exposed to this issue a device needs to be configured with SR specific telemetry statistics:\n\n[ protocols source-packet-routing telemetry statistics per-source per-segment-list ]"}],"datePublic":"2026-04-08T16:00:00.000Z","exploits":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}],"value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"The following software releases have been updated to resolve this specific issue: 22.4R3-S9-EVO, 23.2R2-S6-EVO, 23.4R2-S7-EVO, 24.2R2-S4-EVO, 24.4R2-S2-EVO, 25.2R1-S2-EVO, 25.2R2-EVO, 25.4R1-EVO, and all subsequent releases."}],"value":"The following software releases have been updated to resolve this specific issue: 22.4R3-S9-EVO, 23.2R2-S6-EVO, 23.4R2-S7-EVO, 24.2R2-S4-EVO, 24.4R2-S2-EVO, 25.2R1-S2-EVO, 25.2R2-EVO, 25.4R1-EVO, and all subsequent releases."}],"source":{"advisory":"JSA107870","defect":["1894533"],"discovery":"USER"},"workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Configure the Originator ASN with a value of less than 65,535 (16-bit ASN)."}],"value":"Configure the Originator ASN with a value of less than 65,535 (16-bit ASN)."}],"x_generator":{"engine":"Vulnogram 0.1.0-dev"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-33783","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-04-13T17:41:24.598395Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-13T18:06:19.144Z"}}]}}}