{"action":"Upgrade xterm to 366-1 or later.","affected":[{"fixed":"366-1","introduced":"0"}],"component":"xterm","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["366-1"],"id":"tcs_01M5NFGKDFCDP4JXTVE3PM2H0K","modified_at":"2026-10-23T18:02:57.568114574Z","published_at":"2021-02-10T16:15:13.787Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-27135","https://security-tracker.debian.org/tracker/CVE-2021-27135"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-27135","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-27135"}],"summary":"xterm before Patch #366 allows remote attackers to execute arbitrary code or cause a denial of service (segmentation fault) via a crafted UTF-8 combining character sequence."}