{"id":"CVE-2019-12255","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-12255","generatedAt":"2026-10-29T01:56:02.857Z","title":"Wind River VxWorks has a Buffer Overflow in the TCP component (issue 1 of 4).","description":"Wind River VxWorks has a Buffer Overflow in the TCP component (issue 1 of 4). This is a IPNET security vulnerability: TCP Urgent Pointer = 0 that leads to an integer underflow.","published":"2019-08-09T20:15:11.000Z","lastModified":"2026-06-17T02:14:19.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-120"],"affected":["windriver/vxworks","netapp/e-series santricity os controller","sonicwall/sonicos","siemens/siprotec 5 firmware","siemens/power meter 9410 firmware","siemens/power meter 9810 firmware","siemens/ruggedcom win7000 firmware","siemens/ruggedcom win7018 firmware","siemens/ruggedcom win7025 firmware","siemens/ruggedcom win7200 firmware","belden/hirschmann hios","belden/garrettcom magnum dx940e firmware"],"epss":{"score":0.7525,"percentile":0.99509,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":false,"firstPublished":"2019-08-12","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":47233,"kind":"exploit","title":"VxWorks 6.8 - TCP Urgent Pointer = 0 Integer Underflow","url":"https://www.exploit-db.com/exploits/47233","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/vxworks/dos/47233.py","file":"exploits/vxworks/dos/47233.py","published":"2019-08-12","added":"2019-08-12","updated":"2019-08-12","author":"Zhou Yu","type":"dos","platform":"vxworks","port":null,"verified":false,"codes":["CVE-2019-12255"],"tags":"Denial of Service (DoS)","aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://github.com/dazhouzhou/vxworks-poc/tree/master/CVE-2019-12255"}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 75.3%, higher than 100% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://packetstormsecurity.com/files/154022/VxWorks-6.8-Integer-Underflow.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-189842.pdf","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-352504.pdf","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-632562.pdf","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0009","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://security.netapp.com/advisory/ntap-20190802-0001/","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://support.f5.com/csp/article/K41190253","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://support.f5.com/csp/article/K41190253?utm_source=f5support&amp%3Butm_medium=RSS","source":"cve@mitre.org"},{"url":"https://support2.windriver.com/index.php?page=cve&on=view&id=CVE-2019-12255","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://support2.windriver.com/index.php?page=security-notices","tags":["Issue Tracking","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://www.windriver.com/security/announcements/tcp-ip-network-stack-ipnet-urgent11/","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://packetstormsecurity.com/files/154022/VxWorks-6.8-Integer-Underflow.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-189842.pdf","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-352504.pdf","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-632562.pdf","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0009","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20190802-0001/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.f5.com/csp/article/K41190253","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.f5.com/csp/article/K41190253?utm_source=f5support&amp%3Butm_medium=RSS","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support2.windriver.com/index.php?page=cve&on=view&id=CVE-2019-12255","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support2.windriver.com/index.php?page=security-notices","tags":["Issue Tracking","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.windriver.com/security/announcements/tcp-ip-network-stack-ipnet-urgent11/","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-12255","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."}