CVE-2024-6121Public exploit

SYSTEM code execution via bundled Redis heap overflow

Published Jul 22, 2024 · Updated Aug 1, 2024

Code execution in NI SystemLink Server 2024 Q1 and earlier and FlexLogger 2023 Q2 and earlier allows local users to gain SYSTEM privileges. The bundled Redis service executes crafted Lua that overflows heap buffers in the cJSON and cmsgpack libraries, enabling memory corruption and arbitrary code execution. Low-privileged code execution on the host and authorized access to Redis scripting are required; successful exploitation runs code as SYSTEM.

CVSS severity7.8
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code execution in NI SystemLink Server 2024 Q1 and earlier and FlexLogger 2023 Q2 and earlier allows local users to gain SYSTEM privileges. The bundled Redis service executes crafted Lua that overflows heap buffers in the cJSON and cmsgpack libraries, enabling memory corruption and arbitrary code execution. Low-privileged code execution on the host and authorized access to Redis scripting are required; successful exploitation runs code as SYSTEM.

The record

CVE
CVE-2024-6121
Published
Jul 22, 2024
Updated
Aug 1, 2024
Vendor
National Instruments
Product
SystemLink Server
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 22, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 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 <=24.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

National Instruments · SystemLink Serverversion=0 <=24.1
National Instruments · FlexLoggerversion=0 <=23.2

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8National InstrumentsCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

Public exploit references

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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