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CVE-2018-18568

21
FAUCET Score

CVE-2018-18568 describes a man-in-the-middle vulnerability in Polycom VVX 500 and 601 devices running firmware 5.8.0.12848 and earlier, specifically when integrated with on-premise Skype for Business. The vulnerability stems from the devices' failure to properly validate X.509 certificates, allowing attackers to intercept sensitive credential information. Rated as Medium severity (CVSS 5.9), this vulnerability requires high attack complexity but does not necessitate user interaction or privileges, leading to a high impact on confidentiality. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.8.0.12848CPE matchmatch criteria
cpe:2.3:o:polycom:unified_communications_software:*:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:polycom:vvx_601_firmware:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:polycom:vvx_500_firmware:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.73%
Probability of exploitation in next 30 days
EPSS Percentile
50.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0073 is in the 10th percentile among its peer group of 19,955 CVEs.

Social Chatter

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

seclists.org / bugtraq/2018/Oct/36
ExploitMailing ListThird Party Advisory
syss.de / fileadmin/dokumente/Publikationen/Advisories/SYSS-2018-027.txt
ExploitThird Party Advisory