{"cve":"CVE-2011-1926","nvd":{"published":"2011-05-23T22:55:01.490","modified":"2026-06-16T23:30:24.340","status":"Modified","description":"The STARTTLS implementation in Cyrus IMAP Server before 2.4.7 does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted sessions by sending a cleartext command that is processed after TLS is in place, related to a \"plaintext command injection\" attack, a similar issue to CVE-2011-0411.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-264"],"references":["http://bugzilla.cyrusimap.org/show_bug.cgi?id=3423","http://bugzilla.cyrusimap.org/show_bug.cgi?id=3424","http://git.cyrusimap.org/cyrus-imapd/patch/?id=523a91a5e86c8b9a27a138f04a3e3f2d8786f162","http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061374.html","http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061415.html"],"products":["cmu:cyrus_imap_server"],"source":"nvd","synced_at":"2026-10-19T19:58:50.521460154+00:00"},"epss":{"cve":"CVE-2011-1926","score":0.03999,"percentile":0.9053,"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."]}