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CVE-2016-1187

18
FAUCET Score

CVE-2016-1187 describes a vulnerability in Cybozu KUNAI for iPhone (versions 2.0.3-3.1.5) and Android (versions 2.1.2-3.0.4) where the applications fail to properly verify SSL certificates. This oversight allows for a man-in-the-middle attack, potentially leading to the compromise of sensitive information due to the absence of encryption validation. Rated with a CVSS score of 6.8 (Medium), the vulnerability is network-exploitable with high attack complexity, but does not require user interaction. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2.1.2CPE matchmatch criteria
cpe:2.3:a:cybozu:kunai:2.1.2:*:*:*:*:android:*:*
2.1.3CPE matchmatch criteria
cpe:2.3:a:cybozu:kunai:2.1.3:*:*:*:*:android:*:*
3.0.0CPE matchmatch criteria
cpe:2.3:a:cybozu:kunai:3.0.0:*:*:*:*:android:*:*
3.0.1CPE matchmatch criteria
cpe:2.3:a:cybozu:kunai:3.0.1:*:*:*:*:android:*:*
3.0.2CPE matchmatch criteria
cpe:2.3:a:cybozu:kunai:3.0.2:*:*:*:*:android:*:*

CVSS Data

CVSS version used by this source: 3.0

6.8MEDIUM

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
4.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.19%
Probability of exploitation in next 30 days
EPSS Percentile
64.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0119 is in the 30th percentile among its peer group of 19,956 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

jvndb.jvn.jp / en/contents/2016/JVNDB-2016-000060.html
Third Party AdvisoryVDB Entry
jvn.jp / en/jp/JVN11994518/index.html
Third Party AdvisoryVDB Entry
support.cybozu.com / ja-jp/article/9446
Vendor Advisory
support.cybozu.com / ja-jp/article/9495
Vendor Advisory