CVE-2020-8335

Name: CVE-2020-8335
Creator: NVD / NIST
Published: 2020-09-01T22:15:10.313+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.8/10EPSS 0.31%

Last modified Jun 17, 2026

CVE-2020-8335 is a medium-severity vulnerability rated 6.8/10 on the CVSS scale. The BIOS tamper detection mechanism was not triggered in Lenovo ThinkPad A285, BIOS versions up to r0xuj70w; A485, BIOS versions up to r0wuj65w; T495 BIOS versions up to r12uj55w; T495s/X395, BIOS versions up to r13uj47w, while the emergency-reset button is pressed which may allow for unauthorized access.. EPSS estimates a 0.31% chance of exploitation in the next 30 days.

Description

The BIOS tamper detection mechanism was not triggered in Lenovo ThinkPad A285, BIOS versions up to r0xuj70w; A485, BIOS versions up to r0wuj65w; T495 BIOS versions up to r12uj55w; T495s/X395, BIOS versions up to r13uj47w, while the emergency-reset button is pressed which may allow for unauthorized access.

Metrics

CVSS 3.1

6.8/10

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

EPSS Probability

0.31%

23.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Lenovo	Thinkpad A275 Firmware	< 2020-08-30
Lenovo	Thinkpad A285 Firmware	< 2020-08-30
Lenovo	Thinkpad A475 Firmware	< 2020-08-30
Lenovo	Thinkpad A485 Firmware	< 2020-08-30
Lenovo	Thinkpad T495 Drift Firmware	< 2020-08-30
Lenovo	Thinkpad T495s Jazz Firmware	< 2020-08-30
Lenovo	Thinkpad X1 Carbon \(20bx\) Firmware	< n14et54w
Lenovo	Thinkpad X395 Firmware	< 2020-08-30

References

https://support.lenovo.com/us/en/product_security/LEN-30042Vendor Advisory
https://support.lenovo.com/us/en/product_security/LEN-30042Vendor Advisory

Timeline

Published: Sep 1, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-8335?

How severe is CVE-2020-8335?

CVE-2020-8335 has a CVSS score of 6.8/10 (MEDIUM severity). The EPSS model estimates a 0.31% probability of exploitation in the next 30 days.

How do I fix CVE-2020-8335?

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-2020-8335?

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

Scan your code now

Source: NVD / NIST