https://patchthecve.com/CVEs with upgrade or downgrade fix stepshttps://patchthecve.com/cve/CVE-2006-2659.htmlhttps://patchthecve.com/cve/CVE-2006-2659.htmlTue, 16 Jun 2026 22:25:28 +0000HIGH 7.8: libs/comverp.c in Courier MTA before 0.53.2 allows attackers to cause a denial of service (CPU consumption) via unknown vectors involving usernames that contain the "=" (equals) character, which is not properly handled during encoding.https://patchthecve.com/cve/CVE-2004-0224.htmlhttps://patchthecve.com/cve/CVE-2004-0224.htmlTue, 16 Jun 2026 22:05:12 +0000HIGH 7.5: Multiple buffer overflows in (1) iso2022jp.c or (2) shiftjis.c for Courier-IMAP before 3.0.0, Courier before 0.45, and SqWebMail before 4.0.0 may allow remote attackers to execute arbitrary code "when Unicode character is out of BMP range."https://patchthecve.com/cve/CVE-2003-0040.htmlhttps://patchthecve.com/cve/CVE-2003-0040.htmlTue, 16 Jun 2026 22:01:23 +0000HIGH 7.5: SQL injection vulnerability in the PostgreSQL auth module for courier 0.40 and earlier allows remote attackers to execute SQL code via the user name.https://patchthecve.com/cve/CVE-2002-1311.htmlhttps://patchthecve.com/cve/CVE-2002-1311.htmlTue, 16 Jun 2026 21:59:05 +0000MEDIUM 4.6: Courier sqwebmail before 0.40.0 does not quickly drop privileges after startup in certain cases, which could allow local users to read arbitrary files.https://patchthecve.com/cve/CVE-2002-0914.htmlhttps://patchthecve.com/cve/CVE-2002-0914.htmlTue, 16 Jun 2026 21:58:22 +0000MEDIUM 5.0: Double Precision Courier e-mail MTA allows remote attackers to cause a denial of service (CPU consumption) via a message with an extremely large or negative value for the year, which causes a tight loop.