HOMEVULNERABILITIESCVE-2020-8335
MEDIUM

CVE-2020-8335

NVD-CWE-noinfoPublished: September 1, 2020· Updated: Jun 17, 2026

6.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2020-8335 requires local access, meaning attackers must already have a foothold on the target system.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 6.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorPhysical
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Lenovo16 product(s)
thinkpad a275 firmwarethinkpad a275thinkpad a285 firmwarethinkpad a285thinkpad a475 firmwarethinkpad a475thinkpad a485 firmwarethinkpad a485thinkpad t495 drift firmwarethinkpad t495 driftthinkpad t495s jazz firmwarethinkpad t495s jazz+4
Source: NVD CPE · 16 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://support.lenovo.com/us/en/product_security/LEN-30042
ADVISORYhttps://support.lenovo.com/us/en/product_security/LEN-30042

All References (2)

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

Quick Facts

CVE IDCVE-2020-8335
CVSS Score6.8 / 10
SeverityMEDIUM
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected1 vendor(s)
PublishedSep 1, 2020

Related CVEs (NVD-CWE-noinfo)

CVE-2010-0425
10.0
CVE-2015-0318
10.0
CVE-2014-8440
10.0
CVE-2013-2470
10.0
CVE-2006-0287
10.0
CVE-2007-5108
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-8335 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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