{"cve":"CVE-2021-27420","nvd":{"published":"2022-03-23T20:15:08.310","modified":"2026-06-17T03:44:49.497","status":"Modified","description":"GE UR firmware versions prior to version 8.1x web server task does not properly handle receipt of unsupported HTTP verbs, resulting in the web server becoming temporarily unresponsive after receiving a series of unsupported HTTP requests. When unresponsive, the web server is inaccessible. By itself, this is not particularly significant as the relay remains effective in all other functionality and communication channels.","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:L","score":5.3},"cwes":["CWE-20"],"references":["https://www.cisa.gov/uscert/ics/advisories/icsa-21-075-02","https://www.gegridsolutions.com/Passport/Login.aspx","https://www.cisa.gov/uscert/ics/advisories/icsa-21-075-02","https://www.gegridsolutions.com/Passport/Login.aspx"],"products":["ge:multilin_b30_firmware","ge:multilin_b90_firmware","ge:multilin_c30_firmware","ge:multilin_c60_firmware","ge:multilin_c70_firmware","ge:multilin_c95_firmware","ge:multilin_d30_firmware","ge:multilin_d60_firmware","ge:multilin_f35_firmware","ge:multilin_f60_firmware","ge:multilin_g30_firmware","ge:multilin_g60_firmware","ge:multilin_l30_firmware","ge:multilin_l60_firmware","ge:multilin_l90_firmware","ge:multilin_m60_firmware","ge:multilin_n60_firmware","ge:multilin_t35_firmware","ge:multilin_t60_firmware"],"source":"nvd","synced_at":"2026-10-19T21:29:06.454770966+00:00"},"epss":{"cve":"CVE-2021-27420","score":0.01061,"percentile":0.6459,"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."]}