MEDIUM
CVE-2016-4841
CWE-20Published: April 21, 2017· Updated: Jun 17, 2026
4.3
CVSS v3.1
Official Description
Cybozu Mailwise before 5.4.0 allows remote attackers to inject arbitrary email headers.
Technical Analysis
CVE-2016-4841 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityLow
AvailabilityNone
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Affected Vendors & Products
cybozu1 product(s)
mailwise
Source: NVD CPE · 14 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (8)
→
http://jvn.jp/en/jp/JVN01353821/index.htmlThird Party Advisory · VDB Entry
→
http://jvndb.jvn.jp/en/contents/2016/JVNDB-2016-000135.htmlThird Party Advisory · VDB Entry
→
http://www.securityfocus.com/bid/92459Third Party Advisory · VDB Entry
→
https://support.cybozu.com/ja-jp/article/9607Vendor Advisory
→
http://jvn.jp/en/jp/JVN01353821/index.htmlThird Party Advisory · VDB Entry
→
http://jvndb.jvn.jp/en/contents/2016/JVNDB-2016-000135.htmlThird Party Advisory · VDB Entry
→
http://www.securityfocus.com/bid/92459Third Party Advisory · VDB Entry
→
https://support.cybozu.com/ja-jp/article/9607Vendor Advisory
Quick Facts
CVE IDCVE-2016-4841
CVSS Score4.3 / 10
SeverityMEDIUM
WeaknessCWE-20
CISA KEVNo
Affected1 vendor(s)
PublishedApr 21, 2017
Related CVEs (CWE-20)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2016-4841 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.