CVE-2020-8336 json
Lenovo implemented Intel CSME Anti-rollback ARB protections on some ThinkPad models to prevent roll back of CSME Firmware in flash.
published 2020-06-09 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-29203
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 22%
- public exploits
- 0
- none known
Summary
Lenovo implemented Intel CSME Anti-rollback ARB protections on some ThinkPad models to prevent roll back of CSME Firmware in flash.
Patch / fix
- lenovo thinkpad_e14_firmware 2020-07-10
- lenovo thinkpad_e15_firmware 2020-07-10
- lenovo thinkpad_r14_firmware 2020-07-10
- lenovo thinkpad_s3_gen_2_firmware 2020-07-10
- lenovo thinkpad_e490s_firmware 2020-07-10
- lenovo thinkpad_s3_firmware 2020-07-10
- lenovo thinkpad_e490_firmware 2020-07-10
- lenovo thinkpad_e590_firmware 2020-07-10
- lenovo thinkpad_r490_firmware 2020-07-10
- lenovo thinkpad_r590_firmware 2020-07-10
- lenovo thinkpad_l13_1st_gen_firmware 2020-07-10
- lenovo thinkpad_l1415_gen_1_firmware 2020-07-10
- lenovo thinkpad_l390_yoga_firmware 2020-07-10
- lenovo thinkpad_s2_yoga_4th_gen_firmware 2020-07-10
- lenovo thinkpad_l490_firmware 2020-07-10
- lenovo thinkpad_l590_firmware 2020-07-10
- lenovo thinkpad_p1_(20mx)_firmware n2eet47w
- lenovo thinkpad_p1_(20qx)_firmware n2oet44w
- lenovo thinkpad_p43s_(20rx)_firmware n2iet88w
- lenovo thinkpad_p52_(20mx)_firmware n2cet51w-1.34
Exploit prediction
0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 6.8 | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 4.6 | AV:L/AC:L/Au:N/C:P/I:P/A:P |
Affected products
- Lenovo BIOS
References
-
support.lenovo.com
/us/en/product_security/LEN-30042
vendor-advisory
Sources
- CVE List CVE-2020-8336
- NVD CVE-2020-8336
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