CPE, which stands for Common Platform Enumeration, is a standardized scheme for naming hardware, software, and operating systems. CPE provides a structured naming scheme to uniquely identify and classify information technology systems, platforms, and packages based on certain attributes such as vendor, product name, version, update, edition, and language.
CWE, or Common Weakness Enumeration, is a comprehensive list and categorization of software weaknesses and vulnerabilities. It serves as a common language for describing software security weaknesses in architecture, design, code, or implementation that can lead to vulnerabilities.
CAPEC, which stands for Common Attack Pattern Enumeration and Classification, is a comprehensive, publicly available resource that documents common patterns of attack employed by adversaries in cyber attacks. This knowledge base aims to understand and articulate common vulnerabilities and the methods attackers use to exploit them.
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Microsoft Outlook Express before 4.72.3612.1700 allows a malicious user to send a message that contains a .., which can inadvertently cause Outlook to re-enter POP3 command mode and cause the POP3 session to hang.
CVE Informations
Metrics
Metrics
Score
Severity
CVSS Vector
Source
V2
5
AV:N/AC:L/Au:N/C:N/I:N/A:P
nvd@nist.gov
EPSS
EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.
EPSS Score
The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.
Date
EPSS V0
EPSS V1
EPSS V2 (> 2022-02-04)
EPSS V3 (> 2025-03-07)
EPSS V4 (> 2025-03-17)
2022-02-06
–
–
14.72%
–
–
2022-04-03
–
–
14.72%
–
–
2023-03-12
–
–
–
0.39%
–
2023-06-18
–
–
–
0.39%
–
2024-01-21
–
–
–
0.39%
–
2024-02-11
–
–
–
0.39%
–
2024-06-02
–
–
–
0.39%
–
2024-07-14
–
–
–
0.39%
–
2024-07-21
–
–
–
0.39%
–
2024-12-22
–
–
–
0.68%
–
2025-01-19
–
–
–
0.68%
–
2025-03-18
–
–
–
–
8.43%
2025-03-30
–
–
–
–
8.76%
2025-03-30
–
–
–
–
8.76,%
EPSS Percentile
The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
Publication date : 1999-05-10 22h00 +00:00 Author : Miquel van Smoorenburg EDB Verified : Yes
source: https://www.securityfocus.com/bid/252/info
A vulnerability in Outlook Express allows a malicious message sent to the users mailbox to halt POP mail download. The Microsoft tracking number of this issue is S2134 T6142.
A line with a single dot ('.') stands for EOM (end of message) in the POP3 mail transport protocol. If a message contains a single dot in a line is must be escaped by added an extra dot. However if at the IP level a line containing two such dots falls at a packet boundary such as the one dot is at the end of one packet and the other dot is at the end of the next packet Outlook Express will interpret the dot in the second packet as the EOM marker. This result in Outlook Express switching back to POP3 command mode and interpreting the rest of the message as a POP3 response. This normally result in an error message or the hanging of the session. The message will not be removed from the server and any further attempts will meet with the same result.
Include a few thousand lines like this in an email and the bug will trigger:
So
.
this
.
might
.
actually
.
cause
.
the
.
Products Mentioned
Configuraton 0
Microsoft>>Outlook_express >> Version To (including) 4.72.3612.1700