CVE-2022-31223

Dell BIOS versions contain an Improper Neutralization of Null Byte vulnerability. A local authenticated administrator user could potentially exploit this vulnerability by sending unexpected null bytes in order to read memory on the system.

Published: 2022-09-12 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-31223 is rated Low Risk (11.9/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.18%). Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.

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-2022-31223

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 0.05% 0.18% +0.13%
2 2025-09-16 0.12% 0.05% -0.07%
3 2025-09-13 — 0.12% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-31223

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
2.3 3.1 LOW
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N 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:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
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:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 0.8 1.4 [email protected]
2.3 3.1 LOW
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N 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:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
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:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 0.8 1.4 [email protected]

Weakness enumeration for CVE-2022-31223

Affected software / configurations for CVE-2022-31223

Vendor Product Version Raw CPE
dell chengming_3900_firmware < 1.1.66 cpe:2.3:o:dell:chengming_3900_firmware:*:*:*:*:*:*:*:*
dell inspiron_14_plus_7420_firmware < 1.2.0 cpe:2.3:o:dell:inspiron_14_plus_7420_firmware:*:*:*:*:*:*:*:*
dell inspiron_16_plus_7620_firmware < 1.2.0 cpe:2.3:o:dell:inspiron_16_plus_7620_firmware:*:*:*:*:*:*:*:*
dell inspiron_3910_firmware < 1.1.66 cpe:2.3:o:dell:inspiron_3910_firmware:*:*:*:*:*:*:*:*
dell inspiron_5320_firmware < 1.1.0 cpe:2.3:o:dell:inspiron_5320_firmware:*:*:*:*:*:*:*:*
dell inspiron_5420_firmware < 1.4.1 cpe:2.3:o:dell:inspiron_5420_firmware:*:*:*:*:*:*:*:*
dell inspiron_5620_firmware < 1.4.1 cpe:2.3:o:dell:inspiron_5620_firmware:*:*:*:*:*:*:*:*
dell inspiron_7420_firmware < 1.3.0 cpe:2.3:o:dell:inspiron_7420_firmware:*:*:*:*:*:*:*:*
dell inspiron_7620_firmware < 1.3.0 cpe:2.3:o:dell:inspiron_7620_firmware:*:*:*:*:*:*:*:*
dell optiplex_3000_firmware < 1.1.66 cpe:2.3:o:dell:optiplex_3000_firmware:*:*:*:*:*:*:*:*
dell optiplex_3000_thin_client_firmware < 1.0.7 cpe:2.3:o:dell:optiplex_3000_thin_client_firmware:*:*:*:*:*:*:*:*
dell optiplex_5000_firmware < 1.3.62 cpe:2.3:o:dell:optiplex_5000_firmware:*:*:*:*:*:*:*:*
dell optiplex_5400_firmware < 1.0.13 cpe:2.3:o:dell:optiplex_5400_firmware:*:*:*:*:*:*:*:*
dell optiplex_7000_firmware < 1.3.62 cpe:2.3:o:dell:optiplex_7000_firmware:*:*:*:*:*:*:*:*
dell optiplex_7000_oem_firmware < 1.3.62 cpe:2.3:o:dell:optiplex_7000_oem_firmware:*:*:*:*:*:*:*:*
dell optiplex_7400_firmware < 1.0.13 cpe:2.3:o:dell:optiplex_7400_firmware:*:*:*:*:*:*:*:*
dell precision_3460_small_form_factor_firmware < 1.3.62 cpe:2.3:o:dell:precision_3460_small_form_factor_firmware:*:*:*:*:*:*:*:*
dell precision_3660_tower_firmware < 1.3.71 cpe:2.3:o:dell:precision_3660_tower_firmware:*:*:*:*:*:*:*:*
dell precision_5770_firmware < 1.6.0 cpe:2.3:o:dell:precision_5770_firmware:*:*:*:*:*:*:*:*
dell vostro_3710_firmware < 1.1.66 cpe:2.3:o:dell:vostro_3710_firmware:*:*:*:*:*:*:*:*
dell vostro_3910_firmware < 1.1.66 cpe:2.3:o:dell:vostro_3910_firmware:*:*:*:*:*:*:*:*
dell vostro_5320_firmware < 1.1.0 cpe:2.3:o:dell:vostro_5320_firmware:*:*:*:*:*:*:*:*
dell vostro_5620_firmware < 1.4.1 cpe:2.3:o:dell:vostro_5620_firmware:*:*:*:*:*:*:*:*
dell vostro_7620_firmware < 1.2.0 cpe:2.3:o:dell:vostro_7620_firmware:*:*:*:*:*:*:*:*
dell xps_17_9720_firmware < 1.6.0 cpe:2.3:o:dell:xps_17_9720_firmware:*:*:*:*:*:*:*:*

References for CVE-2022-31223

URL Tags
https://www.dell.com/support/kbdoc/000202196 Patch Vendor Advisory
cvelogic Threat Intelligence