CVE-2020-8335
The BIOS tamper detection mechanism was not triggered in Lenovo ThinkPad A285, BIOS versions up to r0xuj70w; A485, BIOS versions up to…
- 6.1MediumCVSS base score
- 0.31%Exploitation in 30 daysEPSS · top 76% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By lenovo
- 7 months later
· 7 months later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| lenovoCNA (assigner) | 3.1 | Medium6.1 | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
| NVDNVD · Modified | 3.1 | Medium6.8 | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.31% · top 76% of all CVEs (10 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.1.
Affected products
- affected unspecified – < r0xuj70w
- affected unspecified – < r0wuj65w
- affected unspecified – < r12uj55w
Lenovo · ThinkPad T495s/X395 BIOS
- affected unspecified – < r13uj47w
What to do
Solution: Update BIOS to the following BIOS versions (or later): Lenovo ThinkPad A285: r0xuj70w ; A485: r0wuj65w ; T495: r12uj55w ; T495s/X395: r13uj47w
References
1
- https://support.lenovo.com/us/en/product_security/LEN-30042 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2020-29202 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2020-8335)Record last updated .