{"schemaVersion":3,"id":"CVE-2026-101955","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"A Stack-based Buffer Overflow vulnerability in the UTM Anti-Spam SBL of Juniper Networks Junos OS on SRX series allows an unauthenticated remote attacker to cause arbitrary code execution or a denial of service via a injected malformed DNS packet when Anti-Spam SBL inspection is enabled.","dates":{"published":"2026-10-14T16:28:41.014Z","modified":"2026-10-16T14:18:52.564Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.2,"severity":"critical","version":"4.0","versionLabel":"v4.0","source":"CVE.org","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":9.2,"severity":"critical","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":8.1,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":9.2,"severity":"critical","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/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:X/R:X/V:X/RE:X/U:X","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":8.1,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00566,"percentile":0.46201,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-15T00:00:00.000Z","score":0.00566,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00566,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00566,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00566,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00566,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00566,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00566,"percentile":0.46201}],"last30":[{"date":"2026-10-15T00:00:00.000Z","score":0.00566,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00566,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00566,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00566,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00566,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00566,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00566,"percentile":0.46201}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-121","name":"Stack-based Buffer Overflow","description":"A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).","type":"weakness","status":"Draft","abstraction":"Variant","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/121.html"}],"affected":[{"vendor":"juniper networks","product":"junos os","name":"Junos OS","label":"junos os","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 23.2R2-S7.7","noFixRecorded":false,"fixedIn":null},{"text":"≥ 23.4, < 23.4R2-S8.13","noFixRecorded":false,"fixedIn":null},{"text":"≥ 24.2, < 24.2R2-S5.5","noFixRecorded":false,"fixedIn":null},{"text":"≥ 24.4, < 24.4R2-S5","noFixRecorded":false,"fixedIn":null},{"text":"≥ 25.2, < 25.2R2-S2","noFixRecorded":false,"fixedIn":null},{"text":"≥ 25.4, < 25.4R1-S3","noFixRecorded":false,"fixedIn":null},{"text":"≥ 26.2, < 26.2R1-S2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 23.2R2-S7.7 | ≥ 23.4, < 23.4R2-S8.13 | ≥ 24.2, < 24.2R2-S5.5 | ≥ 24.4, < 24.4R2-S5 | ≥ 25.2, < 25.2R2-S2 | ≥ 25.4, < 25.4R1-S3 | ≥ 26.2, < 26.2R1-S2","eol":null,"hubHref":"/vendor/juniper_networks/junos_os"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://supportportal.juniper.net/JSA112186","label":"supportportal.juniper.net/JSA112186","hostname":"supportportal.juniper.net","tags":["Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-14T16:28:41.014Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-16T14:18:52.564Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":70,"level":"high","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T20:58:35.314Z","stale":false,"partial":false}}