CVE-2018-3891

Name: CVE-2018-3891
Creator: NVD / NIST
Published: 2018-11-02T17:29:00.287+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.6/10EPSS 0.40%

Last modified Jun 17, 2026

CVE-2018-3891 is a medium-severity vulnerability rated 4.6/10 on the CVSS scale. An exploitable firmware downgrade vulnerability exists in the firmware update functionality of Yi Home Camera 27US 1.8.7.0D. A specially crafted file can cause a logic flaw, resulting in a firmware downgrade. EPSS estimates a 0.40% chance of exploitation in the next 30 days.

Description

An exploitable firmware downgrade vulnerability exists in the firmware update functionality of Yi Home Camera 27US 1.8.7.0D. A specially crafted file can cause a logic flaw, resulting in a firmware downgrade. An attacker can insert an SD card to trigger this vulnerability.

Metrics

CVSS 3.1

4.6/10

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

EPSS Probability

0.40%

31.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Yitechnology	Yi Home Camera Firmware	1.8.7.0d

References

https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0566Exploit, Third Party Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0566Exploit, Third Party Advisory

Timeline

Published: Nov 2, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-3891?

How severe is CVE-2018-3891?

CVE-2018-3891 has a CVSS score of 4.6/10 (MEDIUM severity). The EPSS model estimates a 0.40% probability of exploitation in the next 30 days.

How do I fix CVE-2018-3891?

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-2018-3891?

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

Scan your code now

Source: NVD / NIST