{"cve":"CVE-2021-27836","nvd":{"published":"2021-11-03T17:15:08.337","modified":"2026-06-17T03:45:30.320","status":"Modified","description":"An issue was discoverered in in function xls_getWorkSheet in xls.c in libxls 1.6.2, allows attackers to cause a denial of service, via a crafted XLS file.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","score":6.5},"cwes":["CWE-476"],"references":["https://github.com/libxls/libxls/issues/94","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5D7XXCVFYRRMI4ENXYSD3MZEBS6SMI7E/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SFOE4Z6T46LA47VXWUVET4ELXRZQ3BWB/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y6XOTFEOCHYKZAFCB6H3KNIIFJ3UFV7V/","https://github.com/libxls/libxls/issues/94"],"products":["fedoraproject:fedora","libxls_project:libxls"],"source":"nvd","synced_at":"2026-10-19T21:24:39.218183596+00:00"},"epss":{"cve":"CVE-2021-27836","score":0.01159,"percentile":0.67116,"date":"2026-11-01"},"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."]}