CVE-2016-4842
Cybozu Mailwise before 5.4.0 allows remote attackers to obtain information on when an email is read.
Cybozu Mailwise before 5.4.0 allows remote attackers to obtain information on when an email is read.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
Cybozu Mailwise before 5.4.0 allows remote attackers to obtain information on when an email is read.
- Record
CVE-2016-4842- CVSS 3.0
- 4.3 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:P/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
CVE List No score
Cybozu Mailwise before 5.4.0 allows remote attackers to obtain information on when an email is read.
- Record
CVE-2016-4842- Updated
- 2026-11-02
EUVDEUVD-2016-5824 No score
Cybozu Mailwise before 5.4.0 allows remote attackers to obtain information on when an email is read.
- Record
EUVD-2016-5824- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-958x-6cr2-9366
Cybozu Mailwise before 5.4.0 allows remote attackers to obtain information on when an email is read.
Cybozu Mailwise before 5.4.0 allows remote attackers to obtain information on when an email is read.
- Record
GHSA-958x-6cr2-9366- CVSS 3.0
- 4.3 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2016-4842 is a medium vulnerability (CVSS 4.3) in Cybozu Mailwise, published April 20, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.59%, the 75th percentile. No source names a fixed version.