CVE-2018-18568

Name: CVE-2018-18568
Creator: NVD / NIST
Published: 2018-10-24T22:29:01.79+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 0.73%

Last modified Jun 17, 2026

CVE-2018-18568 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. Polycom VVX 500 and 601 devices 5.8.0.12848 and earlier allows man-in-the-middle attackers to obtain sensitive credential information by leveraging failure to validate X.509 certificates when used with an on-premise installation with Skype for Business.. EPSS estimates a 0.73% chance of exploitation in the next 30 days.

Description

Polycom VVX 500 and 601 devices 5.8.0.12848 and earlier allows man-in-the-middle attackers to obtain sensitive credential information by leveraging failure to validate X.509 certificates when used with an on-premise installation with Skype for Business.

Metrics

CVSS 3.1

5.9/10

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

EPSS Probability

0.73%

49.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-295

Affected Software

Vendor	Product	Versions
Polycom	Unified Communications Software	<= 5.8.0.12848
Polycom	Vvx 601 Firmware	All versions
Polycom	Vvx 500 Firmware	All versions

References

https://seclists.org/bugtraq/2018/Oct/36Exploit, Mailing List, Third Party Advisory
https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2018-027.txtExploit, Third Party Advisory
https://seclists.org/bugtraq/2018/Oct/36Exploit, Mailing List, Third Party Advisory
https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2018-027.txtExploit, Third Party Advisory

Timeline

Published: Oct 24, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-18568?

How severe is CVE-2018-18568?

CVE-2018-18568 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 0.73% probability of exploitation in the next 30 days.

How do I fix CVE-2018-18568?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-18568?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST