APOP (Authenticated Post Office Protocol) is a legacy email authentication mechanism with a minimal vulnerability footprint that reflects its narrow, dated deployment scope. The sparse disclosures associated with this protocol center on cryptographic and authentication design weaknesses rather than implementation bugs in actively maintained systems, typical of historical standards that have largely been superseded by modern authentication frameworks. Current severity, exploitation, and exposure counts are shown alongside this summary.
The number and severity of CVEs published that impact products developed by Apop Protocol over time
Signals from CVEs in this vendor scope (1 CVEs).
1 CVEs · Highest risk first
| CVE | Published | CVSS | Risk | KEV | Exploit |
|---|---|---|---|---|---|
The APOP protocol allows remote attackers to guess the first 3 characters of a password via man-in-the-middle (MITM) attacks that use crafted message IDs and MD5 collisions. NOTE: | Apr 16, 2007 | 2.6 | 14 | NO | NO |
Signals from CVEs in this vendor scope (1 CVEs).
An overview of all social media posts that mention a CVE ID that affects a product developed by Apop Protocol.
Media articles that mention a CVE ID that affects a product developed by Apop Protocol — matched by CVE ID, not by vendor name.