MEDIUM
CVE-2020-8336
NVD-CWE-noinfoPublished: June 9, 2020· Updated: Jun 17, 2026
6.8
CVSS v3.1
Official Description
Lenovo implemented Intel CSME Anti-rollback ARB protections on some ThinkPad models to prevent roll back of CSME Firmware in flash.
Technical Analysis
CVE-2020-8336 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
Lenovo76 product(s)
thinkpad e14 firmwarethinkpad e14thinkpad e15 firmwarethinkpad e15thinkpad r14 firmwarethinkpad r14thinkpad s3 gen 2 firmwarethinkpad s3 gen 2thinkpad e490s firmwarethinkpad e490sthinkpad s3 firmwarethinkpad s3+64
Source: NVD CPE · 76 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
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GitHub PoC Search
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Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories
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-2020-8336
CVSS Score6.8 / 10
SeverityMEDIUM
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected1 vendor(s)
PublishedJun 9, 2020
Related CVEs (NVD-CWE-noinfo)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-8336 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.