CVE-2024-0335Network attack vector

VPNI service crash via invalid packet values

Published Apr 3, 2024 · Updated Sep 19, 2024

Denial of service in ABB Symphony Plus S+ products allows remote attackers on the HMI network to crash VPNI with invalid packets. The VPNI handler in the Windows-based S+ Control API Runtime processes invalid protocol-field values incorrectly and stops responding. The crash interrupts online data transfers for connected Operations, Engineering, and affected Analyst clients, while configuration data and the wider HMI network remain intact.

CVSS severity7.5
High
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in ABB Symphony Plus S+ products allows remote attackers on the HMI network to crash VPNI with invalid packets. The VPNI handler in the Windows-based S+ Control API Runtime processes invalid protocol-field values incorrectly and stops responding. The crash interrupts online data transfers for connected Operations, Engineering, and affected Analyst clients, while configuration data and the wider HMI network remain intact.

The record

CVE
CVE-2024-0335
Published
Apr 3, 2024
Updated
Sep 19, 2024
Vendor
GENEREX SYSTEMS Computervertriebsgesellschaft mbH
Product
Symphony Plus S+ Engineering
Classifications
CWE-23, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 19, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=2.1 <=2.3_ru3
  2. Affected versionversion=2.1 <=2.3 RU3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

GENEREX SYSTEMS Computervertriebsgesellschaft mbH · Symphony Plus S+ Engineeringversion=2.1 <=2.3_ru3; version=2.1 <=2.3 RU3
GENEREX SYSTEMS Computervertriebsgesellschaft mbH · Symphony Plus S+ Analystversion=7.0.0.0 <=7.2.0.2
GENEREX SYSTEMS Computervertriebsgesellschaft mbH · Symphony Plus S+ Operationsversion=2.0;0 <=2.0 SP6 TC6; version=2.0 <=2.0_sp6_tc6; version=2.1;0 <=2.1 SP2 RU3; version=2.1 <=2.1_sp2_ru3; version=3..0;0 <=3.3 SP1 RU4; version=3.3 <=3.3_sp1_ru4

Published CVSS scores

7.2ABBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:H/RL:O/RC:C
7.5ABBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-23Relative Path Traversal
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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