{"cve":"CVE-2021-20988","nvd":{"published":"2021-05-13T14:15:17.897","modified":"2026-06-17T03:34:36.317","status":"Modified","description":"In Hilscher rcX RTOS versions prios to V2.1.14.1 the actual UDP packet length is not verified against the length indicated by the packet. This may lead to a denial of service of the affected device.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-119"],"references":["https://cert.vde.com/de-de/advisories/vde-2021-018","https://kb.hilscher.com/display/ISMS/2019-04-10+Wrong+handling+of+the+UDP+checksum","https://cert.vde.com/de-de/advisories/vde-2021-018","https://kb.hilscher.com/display/ISMS/2019-04-10+Wrong+handling+of+the+UDP+checksum"],"products":["hilscher:rcx_rtos","pepperl-fuchs:ice1-16di-g60l-v1d_firmware","pepperl-fuchs:ice1-16dio-g60l-c1-v1d_firmware","pepperl-fuchs:ice1-16dio-g60l-v1d_firmware","pepperl-fuchs:ice1-8di8do-g60l-c1-v1d_firmware","pepperl-fuchs:ice1-8di8do-g60l-v1d_firmware","pepperl-fuchs:ice1-8iol-g30l-v1d_firmware","pepperl-fuchs:ice1-8iol-g60l-v1d_firmware","pepperl-fuchs:ice1-8iol-s2-g60l-v1d_firmware"],"source":"nvd","synced_at":"2026-10-19T21:18:09.669877188+00:00"},"epss":{"cve":"CVE-2021-20988","score":0.0099,"percentile":0.62525,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}