{"cve":"CVE-2009-1959","nvd":{"published":"2009-06-08T01:00:00.767","modified":"2026-06-16T23:08:27.040","status":"Modified","description":"Off-by-one error in the event_wallops function in fe-common/irc/fe-events.c in irssi 0.8.13 allows remote IRC servers to cause a denial of service (crash) via an empty command, which triggers a one-byte buffer under-read and a one-byte buffer underflow.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-189"],"references":["http://bugs.irssi.org/index.php?do=details&task_id=662","http://lists.opensuse.org/opensuse-security-announce/2009-07/msg00002.html","http://secunia.com/advisories/35685","http://secunia.com/advisories/35812","http://secunia.com/advisories/36152"],"products":["irssi:irssi"],"source":"nvd","synced_at":"2026-10-19T19:54:07.895733559+00:00"},"epss":{"cve":"CVE-2009-1959","score":0.08385,"percentile":0.94978,"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."]}