MEDIUM
CVE-2015-7776
CWE-200Published: June 19, 2016· Updated: Jun 17, 2026
4.3
CVSS v3.1
Official Description
Cybozu Garoon 3.x and 4.x before 4.2.0 does not properly restrict loading of IMG elements, which makes it easier for remote attackers to track users via a crafted HTML e-mail message, a different vulnerability than CVE-2016-1196.
Technical Analysis
CVE-2015-7776 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.
From a weakness classification perspective (CWE-200): Information exposure vulnerabilities leak sensitive data to unauthorized actors.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityNone
AvailabilityNone
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Affected Vendors & Products
cybozu1 product(s)
garoon
Source: NVD CPE · 24 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 (12)
→
http://jvn.jp/en/jp/JVN53542912/index.htmlVendor Advisory
→
http://jvndb.jvn.jp/jvndb/JVNDB-2016-000085Vendor Advisory
→
https://support.cybozu.com/ja-jp/article/8757Patch · Vendor Advisory
→
https://support.cybozu.com/ja-jp/article/8897Patch · Vendor Advisory
→
https://support.cybozu.com/ja-jp/article/8951Patch · Vendor Advisory
→
https://support.cybozu.com/ja-jp/article/8982Patch · Vendor Advisory
→
http://jvn.jp/en/jp/JVN53542912/index.htmlVendor Advisory
→
http://jvndb.jvn.jp/jvndb/JVNDB-2016-000085Vendor Advisory
→
https://support.cybozu.com/ja-jp/article/8757Patch · Vendor Advisory
→
https://support.cybozu.com/ja-jp/article/8897Patch · Vendor Advisory
→
https://support.cybozu.com/ja-jp/article/8951Patch · Vendor Advisory
→
https://support.cybozu.com/ja-jp/article/8982Patch · Vendor Advisory
Quick Facts
CVE IDCVE-2015-7776
CVSS Score4.3 / 10
SeverityMEDIUM
WeaknessCWE-200
CISA KEVNo
Affected1 vendor(s)
PublishedJun 19, 2016
Related CVEs (CWE-200)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2015-7776 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.