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CVE-2017-10817

31
FAUCET Score

CVE-2017-10817 describes a critical authentication bypass vulnerability affecting MaLion for Windows and Mac versions 5.0.0 through 5.2.1, allowing remote attackers to alter Relay Service Server settings. With a CVSS score of 9.8 (CRITICAL), this vulnerability is easily exploitable over the network without user interaction, leading to complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion, with 10 mentions, indicating awareness among security researchers. Despite its high severity and community interest, it is not listed on the KEV catalog and has received no media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.2.1CPE matchmatch criteria
cpe:2.3:a:intercom:malion:*:*:*:*:*:macos:*:*
<= 5.2.1CPE matchmatch criteria
cpe:2.3:a:intercom:malion:*:*:*:*:*:windows:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.13%
Probability of exploitation in next 30 days
EPSS Percentile
86.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0313 is in the 78th percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

jvn.jp / en/vu/JVNVU91587298/index.html
Third Party AdvisoryVDB Entry
intercom.co.jp / information/2017/0801.html
Vendor Advisory