{"id":"CVE-2018-0833","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-0833","generatedAt":"2026-10-28T19:04:17.214Z","title":"The Microsoft Server Message Block 2.0 and 3.0 (SMBv2/SMBv3) client in Windows 8.1 and RT 8.1 and Windows Server 2012 R2 allows a denial of service vulnerability due to how specially crafted requests are handled, aka \"SMBv2/SMBv3 Null Dereference Denial…","description":"The Microsoft Server Message Block 2.0 and 3.0 (SMBv2/SMBv3) client in Windows 8.1 and RT 8.1 and Windows Server 2012 R2 allows a denial of service vulnerability due to how specially crafted requests are handled, aka \"SMBv2/SMBv3 Null Dereference Denial of Service Vulnerability\".","published":"2018-02-15T02:29:02.000Z","lastModified":"2026-06-17T01:31:46.000Z","status":"Modified","sourceIdentifier":"secure@microsoft.com","cvss":{"version":"3.0","score":5.3,"severity":"MEDIUM","vector":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-476"],"affected":["microsoft/windows 8.1","microsoft/windows rt 8.1","microsoft/windows server 2012"],"epss":{"score":0.39897,"percentile":0.9862,"date":"2026-10-27","history":[{"date":"2026-09-21","score":0.34062,"percentile":0.98369},{"date":"2026-09-22","score":0.39897,"percentile":0.9856}]},"kev":{"listed":false},"exploits":{"count":1,"verified":true,"firstPublished":"2018-02-27","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":44189,"kind":"exploit","title":"Microsoft Windows 8.1/2012 R2 - SMBv3 Null Pointer Dereference Denial of Service","url":"https://www.exploit-db.com/exploits/44189","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/windows/dos/44189.py","file":"exploits/windows/dos/44189.py","published":"2018-02-27","added":"2018-02-27","updated":"2018-03-03","author":"Nabeel Ahmed","type":"dos","platform":"windows","port":null,"verified":true,"codes":["CVE-2018-0833"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://krbtgt.pw/smbv3-null-pointer-dereference-vulnerability/"}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 39.9%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-09-22T00:00:00.000Z","detail":{"to":0.39897,"from":0.34062,"percentile":0.9856},"summary":"EPSS moved from 34.1% to 39.9% probability of exploitation in the next thirty days."}],"references":[{"url":"http://www.securityfocus.com/bid/102924","tags":["Third Party Advisory","VDB Entry"],"source":"secure@microsoft.com"},{"url":"http://www.securitytracker.com/id/1040375","tags":["Third Party Advisory","VDB Entry"],"source":"secure@microsoft.com"},{"url":"https://github.com/KINGSABRI/CVE-in-Ruby/tree/master/CVE-2018-0833","tags":["Exploit","Third Party Advisory"],"source":"secure@microsoft.com"},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0833","tags":["Patch","Vendor Advisory"],"source":"secure@microsoft.com"},{"url":"https://www.exploit-db.com/exploits/44189/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"secure@microsoft.com"},{"url":"http://www.securityfocus.com/bid/102924","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1040375","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/KINGSABRI/CVE-in-Ruby/tree/master/CVE-2018-0833","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0833","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/44189/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-0833","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."}