CVE-2022-34420

Arbitrary code execution via improperly verified SMM buffer

Published Mar 16, 2023 · Updated Feb 26, 2025

Improper SMM communication-buffer verification in Dell PowerEdge BIOS on 14G and 15G servers allows local users to execute code or interrupt service. Dell identifies the SMM communication buffer as the faulty locus but does not disclose the affected handler or the exact verification operation it omits. Exploitation requires high local privileges and access to invoke the firmware path; successful use permits arbitrary code execution or a denial-of-service condition.

CVSS severity7.5
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper SMM communication-buffer verification in Dell PowerEdge BIOS on 14G and 15G servers allows local users to execute code or interrupt service. Dell identifies the SMM communication buffer as the faulty locus but does not disclose the affected handler or the exact verification operation it omits. Exploitation requires high local privileges and access to invoke the firmware path; successful use permits arbitrary code execution or a denial-of-service condition.

The record

CVE
CVE-2022-34420
Published
Mar 16, 2023
Updated
Feb 26, 2025
Vendor
Dell
Product
Dell PowerEdge
Classifications
CWE-119, T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Mar 16, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=14G,15G

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Dell · Dell PowerEdgeversion=14G,15G

Published CVSS scores

7.5DellCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
6.7NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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