CVE-2021-33157

Insufficient control flow management in some Intel(R) Ethernet Adapters and Intel(R) Ethernet Controller I225 Manageability firmware may allow a privileged user to potentially enable escalation of privilege via local access.

Published: 2024-02-23 Last update: 2026-01-09 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-33157 is rated Low Risk (32.2/100): CVSS High severity, with low exploitation likelihood (EPSS 0.20%). 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-2021-33157

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% 0.20% +0.15%
2 2024-05-17 — 0.04% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-33157

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.2 3.1 HIGH
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/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:N)
Doesn’t really leak secrets in a meaningful 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 5.8 [email protected]

Weakness enumeration for CVE-2021-33157

Affected software / configurations for CVE-2021-33157

Vendor Product Version Raw CPE
intel ethernet_controller_i225-it_firmware < 1.87 cpe:2.3:o:intel:ethernet_controller_i225-it_firmware:*:*:*:*:*:*:*:*
intel ethernet_controller_i225-lm_firmware < 1.87 cpe:2.3:o:intel:ethernet_controller_i225-lm_firmware:*:*:*:*:*:*:*:*
intel ethernet_controller_i225-v_firmware < 1.87 cpe:2.3:o:intel:ethernet_controller_i225-v_firmware:*:*:*:*:*:*:*:*
intel ethernet_adapter_complete_driver < 29.0.1 cpe:2.3:a:intel:ethernet_adapter_complete_driver:*:*:*:*:*:*:*:*

References for CVE-2021-33157

cvelogic Threat Intelligence