LOW
CVE-2020-8341
NVD-CWE-noinfoPublished: September 1, 2020· Updated: Jun 17, 2026
2.4
CVSS v3.1
Official Description
In Lenovo systems, SMM BIOS Write Protection is used to prevent writes to SPI Flash. While this provides sufficient protection, an additional layer of protection is provided by SPI Protected Range Registers (PRx). After resuming from S3 sleep mode in various versions of BIOS for some Lenovo ThinkPad systems, the PRx is not set. This does not impact the SMM BIOS Write Protection, which keeps systems protected.
Technical Analysis
CVE-2020-8341 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.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorPhysical
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Affected Vendors & Products
Lenovo20 product(s)
thinkpad t490 \(20nx\) firmwarethinkpad t490 \(20nx\)thinkpad t490 \(20qx\) firmwarethinkpad t490 \(20qx\)thinkpad t490 \(20rx\) firmwarethinkpad t490 \(20rx\)thinkpad t490s \(20nx\) firmwarethinkpad t490s \(20nx\)thinkpad t495 drift firmwarethinkpad t495 driftthinkpad t590 \(20nx\) firmwarethinkpad t590 \(20nx\)+8
Source: NVD CPE · 20 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
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-2020-8341
CVSS Score2.4 / 10
SeverityLOW
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected1 vendor(s)
PublishedSep 1, 2020
Related CVEs (NVD-CWE-noinfo)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-8341 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.