彙總 opensmtpd 相關全部產品的 CVE 與安全漏洞情報，包括 CVSS、EPSS、公開時間與漏洞情報資料。
已披露問題常與 緩衝區溢位與記憶體損壞 相關，可能在 生產負載與軟體部署 場景中帶來 應用程式崩潰與記憶體損壞 等暴露風險。
相關漏洞資料主要來源於公開漏洞披露與安全公告，可用於評估歷史漏洞暴露面與修補優先順序。
| CVE | 摘要 | 來源 | 最高 CVSS | EPSS % | 公開時間 | 更新時間 |
|---|---|---|---|---|---|---|
| CVE-2025-62875 | An Improper Check for Unusual or Exceptional Conditions vulnerability in OpenSMTPD allows local users to crash OpenSMTPD. This issue affects openSUSE Tumbleweed: from ? before 7.8.0p0-1.1. | [email protected] | 6.9 | 0.15% | 2025-11-20 | 2026-06-17 |
| CVE-2023-29323 | ascii_load_sockaddr in smtpd in OpenBSD before 7.1 errata 024 and 7.2 before errata 020, and OpenSMTPD Portable before 7.0.0-portable commit f748277, can abort upon a connection from a local, scoped IPv6 address. | [email protected] | 7.8 | 0.28% | 2023-04-04 | 2026-06-17 |
| CVE-2020-35680 | smtpd/lka_filter.c in OpenSMTPD before 6.8.0p1, in certain configurations, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted pattern of client activity, because the filter state machine does not properly maintain the I/O channel between the SMTP engine and the filters layer. | [email protected] | 7.5 | 3.58% | 2020-12-24 | 2026-06-16 |
| CVE-2020-35679 | smtpd/table.c in OpenSMTPD before 6.8.0p1 lacks a certain regfree, which might allow attackers to trigger a "very significant" memory leak via messages to an instance that performs many regex lookups. | [email protected] | 7.5 | 2.83% | 2020-12-24 | 2026-06-16 |
| CVE-2020-8794 | OpenSMTPD before 6.6.4 allows remote code execution because of an out-of-bounds read in mta_io in mta_session.c for multi-line replies. Although this vulnerability affects the client side of OpenSMTPD, it is possible to attack a server because the server code launches the client code during bounce handling. | [email protected] | 9.8 | 88.53% | 2020-02-25 | 2026-06-16 |
| CVE-2020-8793 | OpenSMTPD before 6.6.4 allows local users to read arbitrary files (e.g., on some Linux distributions) because of a combination of an untrusted search path in makemap.c and race conditions in the offline functionality in smtpd.c. | [email protected] | 4.7 | 0.90% | 2020-02-25 | 2026-06-16 |