{"id":"CVE-2010-0477","url":"https://www.cyber-defence.io/tools/cve/CVE-2010-0477","generatedAt":"2026-10-27T19:37:54.743Z","title":"The SMB client in Microsoft Windows Server 2008 R2 and Windows 7 does not properly handle (1) SMBv1 and (2) SMBv2 response packets, which allows remote SMB servers and man-in-the-middle attackers to execute arbitrary code via a crafted packet that…","description":"The SMB client in Microsoft Windows Server 2008 R2 and Windows 7 does not properly handle (1) SMBv1 and (2) SMBv2 response packets, which allows remote SMB servers and man-in-the-middle attackers to execute arbitrary code via a crafted packet that causes the client to read the entirety of the response, and then improperly interact with the Winsock Kernel (WSK), aka \"SMB Client Message Size Vulnerability.\"","published":"2010-04-14T16:00:02.000Z","lastModified":"2026-06-16T23:16:15.000Z","status":"Modified","sourceIdentifier":"secure@microsoft.com","cvss":{"version":"2.0","score":10,"severity":"HIGH","vector":"AV:N/AC:L/Au:N/C:C/I:C/A:C"},"cwe":["CWE-399"],"affected":["microsoft/windows 7","microsoft/windows server 2008"],"epss":{"score":0.50186,"percentile":0.98898,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":true,"firstPublished":"2010-04-17","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":12273,"kind":"exploit","title":"Microsoft Windows 7/2008 R2 - SMB Client Trans2 Stack Overflow (MS10-020) (PoC)","url":"https://www.exploit-db.com/exploits/12273","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/windows/dos/12273.py","file":"exploits/windows/dos/12273.py","published":"2010-04-17","added":"2010-04-16","updated":"2011-02-20","author":"laurent gaffie","type":"dos","platform":"windows","port":null,"verified":true,"codes":["OSVDB-64928","CVE-2010-0477","OSVDB-64927","CVE-2010-0476","OSVDB-64926","CVE-2010-0270","OSVDB-64925","CVE-2010-0269","MS10-020"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":"http://www.exploit-db.com/screenshots/idlt12500/screen-shot-2011-02-20-at-84259-am.png","referenceUrl":"http://seclists.org/fulldisclosure/2010/Apr/201"}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 50.2%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://secunia.com/advisories/39372","source":"secure@microsoft.com"},{"url":"http://www.us-cert.gov/cas/techalerts/TA10-103A.html","tags":["US Government Resource"],"source":"secure@microsoft.com"},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-020","source":"secure@microsoft.com"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6859","source":"secure@microsoft.com"},{"url":"http://secunia.com/advisories/39372","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.us-cert.gov/cas/techalerts/TA10-103A.html","tags":["US Government Resource"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-020","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6859","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2010-0477","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."}