CVE-2020-16138

Name: CVE-2020-16138
Creator: NVD / NIST
Published: 2020-08-12T21:15:12.063+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 21.36%

Last modified Jun 17, 2026

CVE-2020-16138 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A denial-of-service issue in Cisco Unified IP Conference Station 7937G 1-4-4-0 through 1-4-5-7 allows attackers to remotely disable the device until it is power cycled. Note: We cannot prove this vulnerability exists. EPSS estimates a 21.36% chance of exploitation in the next 30 days.

Description

A denial-of-service issue in Cisco Unified IP Conference Station 7937G 1-4-4-0 through 1-4-5-7 allows attackers to remotely disable the device until it is power cycled. Note: We cannot prove this vulnerability exists. Out of an abundance of caution, this CVE is being assigned to better serve our customers and ensure all who are still running this product understand that the product is end of life and should be removed or upgraded. For more information on this, and how to upgrade, refer to the CVE’s reference information

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

21.36%

97.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Cisco	Unified Ip Conference Station 7937g Firmware	>= 1.4.4.0, <= 1.4.5.7

References

https://packetstormsecurity.com/files/158819/Cisco-7937G-Denial-Of-Service.htmlExploit, Third Party Advisory, VDB Entry
https://www.blacklanternsecurity.com/2020-08-07-Cisco-Unified-IP-Conference-Station-7937G/Exploit, Third Party Advisory
https://www.cisco.com/c/en/us/products/collateral/collaboration-endpoints/unified-ip-phone-7940g/end_of_life_notice_c51-729487.htmlVendor Advisory
https://packetstormsecurity.com/files/158819/Cisco-7937G-Denial-Of-Service.htmlExploit, Third Party Advisory, VDB Entry
https://www.blacklanternsecurity.com/2020-08-07-Cisco-Unified-IP-Conference-Station-7937G/Exploit, Third Party Advisory
https://www.cisco.com/c/en/us/products/collateral/collaboration-endpoints/unified-ip-phone-7940g/end_of_life_notice_c51-729487.htmlVendor Advisory

Timeline

Published: Aug 12, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-16138?

How severe is CVE-2020-16138?

CVE-2020-16138 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 21.36% probability of exploitation in the next 30 days.

How do I fix CVE-2020-16138?

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-2020-16138?

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

Scan your code now

Source: NVD / NIST