CVE-2021-26943 json
The UX360CA BIOS through 303 on ASUS laptops allow an attacker (with the ring 0 privilege) to overwrite nearly arbitrary physical memory lo…
published 2021-03-31 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-13725
- cvss
- 8.2
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 61%
- public exploits
- 0
- none known
Summary
The UX360CA BIOS through 303 on ASUS laptops allow an attacker (with the ring 0 privilege) to overwrite nearly arbitrary physical memory locations, including SMRAM, and execute arbitrary code in the SMM (issue 3 of 3).
Patch / fix
- asus ux360ca_bios 304
Exploit prediction
0.94% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- asus.com https://www.asus.com/support/FAQ/1045541/ referenced PoC, tagged "exploit" by a source, unverified
- youtube.com https://www.youtube.com/watch?v=1H3AfaVyeuk referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 8.2 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
| NVD | 2.0 | 7.2 | AV:L/AC:L/Au:N/C:C/I:C/A:C |
References
-
asus.com
/support/FAQ/1045541/
exploit, vendor-advisory
-
youtube.com
/watch?v=1H3AfaVyeuk
exploit, third-party-advisory
Sources
- CVE List CVE-2021-26943
- NVD CVE-2021-26943
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