{"id":"CVE-2017-16726","url":"https://www.cyber-defence.io/tools/cve/CVE-2017-16726","generatedAt":"2026-10-28T20:11:07.451Z","title":"An attacker can forge arbitrary ADS packets when legitimate ADS traffic is observable.","description":"Beckhoff TwinCAT supports communication over ADS. ADS is a protocol for industrial automation in protected environments. ADS has not been designed to achieve security purposes and therefore does not include any encryption algorithms because of their negative effect on performance and throughput. An attacker can forge arbitrary ADS packets when legitimate ADS traffic is observable.","published":"2018-06-27T19:29:00.000Z","lastModified":"2026-06-17T01:09:43.000Z","status":"Modified","sourceIdentifier":"ics-cert@hq.dhs.gov","cvss":{"version":"3.0","score":9.1,"severity":"CRITICAL","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"},"cwe":["CWE-285","CWE-326"],"affected":["beckhoff/twincat"],"epss":{"score":0.00508,"percentile":0.43158,"date":"2026-10-27","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 (0.51%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2017-001.pdf","tags":["Vendor Advisory"],"source":"ics-cert@hq.dhs.gov"},{"url":"https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2017-001.pdf","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-16726","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."}