CVE-2024-33673

Local code execution via writable DLL search path

Published Apr 26, 2024 · Updated Aug 21, 2024

DLL hijacking in Veritas Backup Exec 21.0 through 22.2 allows local users to execute code through the Windows DLL search path. Backup Exec loads DLLs by search-path resolution rather than a fixed trusted location, allowing a planted library in a searched directory to run. The required gate is a non-administrator Windows account that can create files in a DLL search-path directory, after which the planted code runs in the loading process.

CVSS severity7.8
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DLL hijacking in Veritas Backup Exec 21.0 through 22.2 allows local users to execute code through the Windows DLL search path. Backup Exec loads DLLs by search-path resolution rather than a fixed trusted location, allowing a planted library in a searched directory to run. The required gate is a non-administrator Windows account that can create files in a DLL search-path directory, after which the planted code runs in the loading process.

The record

CVE
CVE-2024-33673
Published
Apr 26, 2024
Updated
Aug 21, 2024
Vendor
Veritas Technologies LLC
Product
Backup Exec
Classifications
CWE-284, T1574.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 26, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 21, 2024Record 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=0 <22.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Veritas Technologies LLC · Backup Execversion=0 <22.2

Published CVSS scores

7.8VeritasCVSS:3.1/AV:L/AC:L/PR:L/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
T1574.001DLL Search Order Hijacking

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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