{"cve":"CVE-2021-20592","nvd":{"published":"2021-08-05T21:15:10.467","modified":"2026-06-17T03:34:04.817","status":"Modified","description":"Missing synchronization vulnerability in GOT2000 series GT27 model communication driver versions 01.19.000 through 01.39.010, GT25 model communication driver versions 01.19.000 through 01.39.010 and GT23 model communication driver versions 01.19.000 through 01.39.010 and GT SoftGOT2000 versions 1.170C through 1.256S allows a remote unauthenticated attacker to cause DoS condition on the MODBUS/TCP slave communication function of the products by rapidly and repeatedly connecting and disconnecting to and from the MODBUS/TCP communication port on a target. Restart or reset is required to recover.","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-662"],"references":["https://jvn.jp/vu/JVNVU92414172/index.html","https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-007_en.pdf","https://jvn.jp/vu/JVNVU92414172/index.html","https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-007_en.pdf"],"products":["mitsubishielectric:got2000_gt23_firmware","mitsubishielectric:got2000_gt25_firmware","mitsubishielectric:got2000_gt27_firmware","mitsubishielectric:gt_softgot2000"],"source":"nvd","synced_at":"2026-10-19T21:21:13.713336758+00:00"},"epss":{"cve":"CVE-2021-20592","score":0.01497,"percentile":0.74217,"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."]}