{"id":"CVE-2011-3321","url":"https://www.cyber-defence.io/tools/cve/CVE-2011-3321","generatedAt":"2026-10-27T22:04:06.954Z","title":"Heap-based buffer overflow in the Siemens WinCC Runtime Advanced Loader, as used in SIMATIC WinCC flexible Runtime and SIMATIC WinCC (TIA Portal) Runtime Advanced, allows remote attackers to cause a denial of service (memory corruption) or possibly…","description":"Heap-based buffer overflow in the Siemens WinCC Runtime Advanced Loader, as used in SIMATIC WinCC flexible Runtime and SIMATIC WinCC (TIA Portal) Runtime Advanced, allows remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code via a crafted packet to TCP port 2308.","published":"2011-09-16T12:35:26.000Z","lastModified":"2026-06-16T23:33:05.000Z","status":"Modified","sourceIdentifier":"cret@cert.org","cvss":{"version":"2.0","score":9.3,"severity":"HIGH","vector":"AV:N/AC:M/Au:N/C:C/I:C/A:C"},"cwe":["CWE-119"],"affected":["siemens/simatic wincc flexible runtime","siemens/simatic wincc runtime"],"epss":{"score":0.0707,"percentile":0.94166,"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":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (7.07%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://cache.automation.siemens.com/dnl/jI/jI0NDY5AAAA_29054992_FAQ/Siemens_Security_Advisory_SSA-460621_V1_2.pdf","source":"cret@cert.org"},{"url":"http://secunia.com/advisories/46011","tags":["Vendor Advisory"],"source":"cret@cert.org"},{"url":"http://support.automation.siemens.com/WW/view/en/29054992","source":"cret@cert.org"},{"url":"http://www.us-cert.gov/control_systems/pdf/ICSA-11-244-01.pdf","tags":["US Government Resource"],"source":"cret@cert.org"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/69803","source":"cret@cert.org"},{"url":"http://cache.automation.siemens.com/dnl/jI/jI0NDY5AAAA_29054992_FAQ/Siemens_Security_Advisory_SSA-460621_V1_2.pdf","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/46011","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://support.automation.siemens.com/WW/view/en/29054992","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.us-cert.gov/control_systems/pdf/ICSA-11-244-01.pdf","tags":["US Government Resource"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/69803","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2011-3321","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."}