CVE-2021-36343

Dell BIOS contains an improper input validation vulnerability. A local authenticated malicious user may potentially exploit this vulnerability by using an SMI to gain arbitrary code execution in SMRAM.

Published: 2022-01-24 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-36343 is rated Low Risk (35.5/100): CVSS High severity, with low exploitation likelihood (EPSS 0.24%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-36343

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.04% 0.24% +0.20%
2 2025-03-30 0.08% 0.04% -0.04%
3 2025-03-29 — 0.08% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-36343

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 0.8 6.0 [email protected]
6.4 3.1 MEDIUM
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 0.5 5.9 [email protected]
7.2 2.0 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 10.0 [email protected]

Weakness enumeration for CVE-2021-36343

Affected software / configurations for CVE-2021-36343

Vendor Product Version Raw CPE
dell precision_5820_tower_firmware < 2.12.1 cpe:2.3:o:dell:precision_5820_tower_firmware:*:*:*:*:*:*:*:*
dell precision_7510_firmware < 1.24.3 cpe:2.3:o:dell:precision_7510_firmware:*:*:*:*:*:*:*:*
dell precision_7520_firmware < 1.22.0 cpe:2.3:o:dell:precision_7520_firmware:*:*:*:*:*:*:*:*
dell precision_7530_firmware < 1.18.2 cpe:2.3:o:dell:precision_7530_firmware:*:*:*:*:*:*:*:*
dell precision_7540_firmware < 1.15.1 cpe:2.3:o:dell:precision_7540_firmware:*:*:*:*:*:*:*:*
dell precision_7550_firmware < 1.10.1 cpe:2.3:o:dell:precision_7550_firmware:*:*:*:*:*:*:*:*
dell precision_7560_firmware < 1.5.0 cpe:2.3:o:dell:precision_7560_firmware:*:*:*:*:*:*:*:*
dell precision_7710_firmware < 1.24.3 cpe:2.3:o:dell:precision_7710_firmware:*:*:*:*:*:*:*:*
dell precision_7720_firmware < 1.22.0 cpe:2.3:o:dell:precision_7720_firmware:*:*:*:*:*:*:*:*
dell precision_7730_firmware < 1.18.2 cpe:2.3:o:dell:precision_7730_firmware:*:*:*:*:*:*:*:*
dell precision_7740_firmware < 1.15.1 cpe:2.3:o:dell:precision_7740_firmware:*:*:*:*:*:*:*:*
dell precision_7750_firmware < 1.10.1 cpe:2.3:o:dell:precision_7750_firmware:*:*:*:*:*:*:*:*
dell precision_7760_firmware < 1.5.0 cpe:2.3:o:dell:precision_7760_firmware:*:*:*:*:*:*:*:*
dell vostro_13_5370_firmware < 1.20.0 cpe:2.3:o:dell:vostro_13_5370_firmware:*:*:*:*:*:*:*:*
dell vostro_14_3468_firmware < 3.10.0 cpe:2.3:o:dell:vostro_14_3468_firmware:*:*:*:*:*:*:*:*
dell vostro_14_3478_firmware < 1.15.0 cpe:2.3:o:dell:vostro_14_3478_firmware:*:*:*:*:*:*:*:*
dell vostro_14_5468_firmware < 1.17.0 cpe:2.3:o:dell:vostro_14_5468_firmware:*:*:*:*:*:*:*:*
dell vostro_14_5471_firmware < 1.20.0 cpe:2.3:o:dell:vostro_14_5471_firmware:*:*:*:*:*:*:*:*
dell vostro_15_3568_firmware < 3.10.0 cpe:2.3:o:dell:vostro_15_3568_firmware:*:*:*:*:*:*:*:*
dell vostro_15_3572_firmware < 1.12.0 cpe:2.3:o:dell:vostro_15_3572_firmware:*:*:*:*:*:*:*:*
dell vostro_15_3578_firmware < 1.15.0 cpe:2.3:o:dell:vostro_15_3578_firmware:*:*:*:*:*:*:*:*
dell vostro_15_5410_firmware < 2.4.1 cpe:2.3:o:dell:vostro_15_5410_firmware:*:*:*:*:*:*:*:*
dell vostro_15_5510_firmware < 2.4.1 cpe:2.3:o:dell:vostro_15_5510_firmware:*:*:*:*:*:*:*:*
dell vostro_15_5568_firmware < 1.17.0 cpe:2.3:o:dell:vostro_15_5568_firmware:*:*:*:*:*:*:*:*
dell vostro_15_7570_firmware < 1.15.0 cpe:2.3:o:dell:vostro_15_7570_firmware:*:*:*:*:*:*:*:*
dell vostro_15_7580_firmware < 1.18.0 cpe:2.3:o:dell:vostro_15_7580_firmware:*:*:*:*:*:*:*:*
dell vostro_3070_firmware < 2.20.0 cpe:2.3:o:dell:vostro_3070_firmware:*:*:*:*:*:*:*:*
dell vostro_3267_firmware < 1.18.0 cpe:2.3:o:dell:vostro_3267_firmware:*:*:*:*:*:*:*:*
dell vostro_3268_firmware < 1.18.0 cpe:2.3:o:dell:vostro_3268_firmware:*:*:*:*:*:*:*:*
dell vostro_3400_firmware < 1.9.0 cpe:2.3:o:dell:vostro_3400_firmware:*:*:*:*:*:*:*:*
dell vostro_3401_firmware < 1.9.0 cpe:2.3:o:dell:vostro_3401_firmware:*:*:*:*:*:*:*:*
dell vostro_3470_firmware < 2.20.0 cpe:2.3:o:dell:vostro_3470_firmware:*:*:*:*:*:*:*:*
dell vostro_3471_firmware < 1.8.0 cpe:2.3:o:dell:vostro_3471_firmware:*:*:*:*:*:*:*:*
dell vostro_3480_firmware < 1.16.0 cpe:2.3:o:dell:vostro_3480_firmware:*:*:*:*:*:*:*:*
dell vostro_3481_firmware < 1.15.0 cpe:2.3:o:dell:vostro_3481_firmware:*:*:*:*:*:*:*:*
dell vostro_3490_firmware < 1.15.0 cpe:2.3:o:dell:vostro_3490_firmware:*:*:*:*:*:*:*:*
dell vostro_3500_firmware < 1.9.0 cpe:2.3:o:dell:vostro_3500_firmware:*:*:*:*:*:*:*:*
dell vostro_3501_firmware < 1.9.0 cpe:2.3:o:dell:vostro_3501_firmware:*:*:*:*:*:*:*:*
dell vostro_3510_firmware < 1.6.0 cpe:2.3:o:dell:vostro_3510_firmware:*:*:*:*:*:*:*:*
dell vostro_3562_firmware < 1.19.0 cpe:2.3:o:dell:vostro_3562_firmware:*:*:*:*:*:*:*:*
dell vostro_3580_firmware < 1.16.0 cpe:2.3:o:dell:vostro_3580_firmware:*:*:*:*:*:*:*:*
dell vostro_3581_firmware < 1.15.0 cpe:2.3:o:dell:vostro_3581_firmware:*:*:*:*:*:*:*:*
dell vostro_3582_firmware < 1.11.0 cpe:2.3:o:dell:vostro_3582_firmware:*:*:*:*:*:*:*:*
dell vostro_3583_firmware < 1.16.0 cpe:2.3:o:dell:vostro_3583_firmware:*:*:*:*:*:*:*:*
dell vostro_3584_firmware < 1.15.0 cpe:2.3:o:dell:vostro_3584_firmware:*:*:*:*:*:*:*:*
dell vostro_3590_firmware < 1.15.0 cpe:2.3:o:dell:vostro_3590_firmware:*:*:*:*:*:*:*:*
dell vostro_3660_firmware < 1.18.0 cpe:2.3:o:dell:vostro_3660_firmware:*:*:*:*:*:*:*:*
dell vostro_3667_firmware < 1.18.0 cpe:2.3:o:dell:vostro_3667_firmware:*:*:*:*:*:*:*:*
dell vostro_3668_firmware < 1.18.0 cpe:2.3:o:dell:vostro_3668_firmware:*:*:*:*:*:*:*:*
dell vostro_3669_firmware < 1.18.0 cpe:2.3:o:dell:vostro_3669_firmware:*:*:*:*:*:*:*:*
dell vostro_3670_firmware < 2.20.0 cpe:2.3:o:dell:vostro_3670_firmware:*:*:*:*:*:*:*:*
dell vostro_3671_firmware < 1.8.0 cpe:2.3:o:dell:vostro_3671_firmware:*:*:*:*:*:*:*:*
dell vostro_3681_firmware < 2.6.1 cpe:2.3:o:dell:vostro_3681_firmware:*:*:*:*:*:*:*:*
dell vostro_3690_firmware < 1.2.2 cpe:2.3:o:dell:vostro_3690_firmware:*:*:*:*:*:*:*:*
dell vostro_3881_firmware < 2.6.1 cpe:2.3:o:dell:vostro_3881_firmware:*:*:*:*:*:*:*:*
dell vostro_3888_firmware < 2.6.1 cpe:2.3:o:dell:vostro_3888_firmware:*:*:*:*:*:*:*:*
dell vostro_3890_firmware < 1.2.2 cpe:2.3:o:dell:vostro_3890_firmware:*:*:*:*:*:*:*:*
dell vostro_5090_firmware < 1.10.0 cpe:2.3:o:dell:vostro_5090_firmware:*:*:*:*:*:*:*:*
dell vostro_5300_firmware < 1.9.0 cpe:2.3:o:dell:vostro_5300_firmware:*:*:*:*:*:*:*:*
dell vostro_5301_firmware < 1.11.0 cpe:2.3:o:dell:vostro_5301_firmware:*:*:*:*:*:*:*:*
dell vostro_5310_firmware < 2.5.0 cpe:2.3:o:dell:vostro_5310_firmware:*:*:*:*:*:*:*:*
dell vostro_5390_firmware < 1.14.0 cpe:2.3:o:dell:vostro_5390_firmware:*:*:*:*:*:*:*:*
dell vostro_5391_firmware < 1.15.0 cpe:2.3:o:dell:vostro_5391_firmware:*:*:*:*:*:*:*:*
dell vostro_5401_firmware < 1.9.0 cpe:2.3:o:dell:vostro_5401_firmware:*:*:*:*:*:*:*:*
dell vostro_5402_firmware < 1.8.0 cpe:2.3:o:dell:vostro_5402_firmware:*:*:*:*:*:*:*:*
dell vostro_5481_firmware < 2.12.0 cpe:2.3:o:dell:vostro_5481_firmware:*:*:*:*:*:*:*:*
dell vostro_5490_firmware < 1.16.1 cpe:2.3:o:dell:vostro_5490_firmware:*:*:*:*:*:*:*:*
dell vostro_5491_firmware < 1.18.0 cpe:2.3:o:dell:vostro_5491_firmware:*:*:*:*:*:*:*:*
dell vostro_5501_firmware < 1.9.0 cpe:2.3:o:dell:vostro_5501_firmware:*:*:*:*:*:*:*:*
dell vostro_5502_firmware < 1.8.0 cpe:2.3:o:dell:vostro_5502_firmware:*:*:*:*:*:*:*:*
dell vostro_5581_firmware < 2.12.0 cpe:2.3:o:dell:vostro_5581_firmware:*:*:*:*:*:*:*:*
dell vostro_5590_firmware < 1.16.1 cpe:2.3:o:dell:vostro_5590_firmware:*:*:*:*:*:*:*:*
dell vostro_5591_firmware < 1.18.0 cpe:2.3:o:dell:vostro_5591_firmware:*:*:*:*:*:*:*:*
dell vostro_5880_firmware < 1.6.0 cpe:2.3:o:dell:vostro_5880_firmware:*:*:*:*:*:*:*:*
dell vostro_5890_firmware < 1.2.2 cpe:2.3:o:dell:vostro_5890_firmware:*:*:*:*:*:*:*:*
dell vostro_7500_firmware < 1.10.0 cpe:2.3:o:dell:vostro_7500_firmware:*:*:*:*:*:*:*:*
dell vostro_7510_firmware < 1.2.1 cpe:2.3:o:dell:vostro_7510_firmware:*:*:*:*:*:*:*:*
dell vostro_7590_firmware < 1.12.1 cpe:2.3:o:dell:vostro_7590_firmware:*:*:*:*:*:*:*:*
dell alienware_13_r3_firmware < 1.14.0 cpe:2.3:o:dell:alienware_13_r3_firmware:*:*:*:*:*:*:*:*
dell alienware_15_r3_firmware < 1.14.0 cpe:2.3:o:dell:alienware_15_r3_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-36343

cvelogic Threat Intelligence