{"id":"CVE-2026-33799","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-33799","generatedAt":"2026-10-28T02:56:41.083Z","title":"An Out-of-bounds Write vulnerability in the SNMP daemon (snmpd) of Juniper Networks Junos OS and Junos OS Evolved allows an authenticated network-based attacker sending specific valid SNMPv3 queries to trigger a memory leak.","description":"An Out-of-bounds Write vulnerability in the SNMP daemon (snmpd) of Juniper Networks Junos OS and Junos OS Evolved allows an authenticated network-based attacker sending specific valid SNMPv3 queries to trigger a memory leak. Over time, continuous receipt of these queries will result in snmpd process memory exhaustion, resulting in a process crash and restart, impacting the ability to monitor the system via SNMP.\n\nMemory usage can be monitored using the following command:\n\nuser@device> show system processes extensive | match snmpd\n\n\n\n\nThis issue affects:\n\nJunos OS:\n\n\n  *  all versions before 21.2R3-S8;\n  *  from 21.4 before 21.4R3-S7;\n  *  from 22.1 before 22.1R3-S6;\n  *  from 22.2 before 22.2R3-S4;\n  *  from 22.3 before 22.3R3-S3;\n  *  from 22.4 before 22.4R3-S2;\n  *  from 23.2 before 23.2R2;\n  *  from 23.4 before 23.4R2.\n\n\n\nJunos OS Evolved:\n  *  all versions before 21.2R3-S8-EVO;\n  *  from 21.4 before 21.4R3-S7-EVO;\n  *  all versions of 22.1-EVO,\n  *  from 22.2 before 22.2R3-S4-EVO;\n  *  from 22.3 before 22.3R3-S3-EVO;\n  *  all versions of 22.4-EVO,\n  *  from 23.2 before 23.2R2-EVO;\n  *  from 23.4 before 23.4R2-EVO.","published":"2026-07-09T21:16:55.000Z","lastModified":"2026-07-13T12:55:46.000Z","status":"Analyzed","sourceIdentifier":"sirt@juniper.net","cvss":{"version":"4.0","score":5.3,"severity":"MEDIUM","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-787"],"affected":["juniper/junos","juniper/junos os evolved"],"epss":{"score":0.00367,"percentile":0.30332,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.37%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://supportportal.juniper.net/JSA110074","tags":["Mitigation","Vendor Advisory"],"source":"sirt@juniper.net"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-33799","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}