{"cve":"CVE-2021-33477","nvd":{"published":"2021-05-20T20:15:07.397","modified":"2026-06-17T03:54:36.840","status":"Modified","description":"rxvt-unicode 9.22, rxvt 2.7.10, mrxvt 0.5.4, and Eterm 0.9.7 allow (potentially remote) code execution because of improper handling of certain escape sequences (ESC G Q). A response is terminated by a newline.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-755"],"references":["http://cvs.schmorp.de/rxvt-unicode/Changes?view=log","http://cvs.schmorp.de/rxvt-unicode/src/command.C?r1=1.582&r2=1.583","https://git.enlightenment.org/apps/eterm.git/log/","https://lists.debian.org/debian-lts-announce/2021/05/msg00026.html","https://lists.debian.org/debian-lts-announce/2021/06/msg00010.html"],"products":["debian:debian_linux","eterm_project:eterm","fedoraproject:fedora","mrxvt_project:mrxvt","rxvt-unicode_project:rxvt-unicode","rxvt_project:rxvt"],"source":"nvd","synced_at":"2026-10-19T21:18:09.669877188+00:00"},"epss":{"cve":"CVE-2021-33477","score":0.04089,"percentile":0.90727,"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."]}