CVE-2024-28757
highpriority · track · 41EPSS 0.020 · 81 %ileexploit · PoCDEEUNLRUUSEPSS · scored 2026-10-26
libexpat through 2.6.1 allows an XML Entity Expansion attack when there is isolated use of external parsers (created via XML_ExternalEntityParserCreate).
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
A vendor fix is available.
- FixedSIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)siemens_psirt
Update to V3.1.5 or later version
https://support.industry.siemens.com/cs/ww/en/view/109478459/ - FixedSIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)siemens_psirt
Update to V3.1.5 or later version
https://support.industry.siemens.com/cs/ww/en/view/109478459/ - FixedSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)siemens_psirt
Update to V3.1.5 or later version
https://support.industry.siemens.com/cs/ww/en/view/109478459/ - FixedSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)siemens_psirt
Update to V3.1.5 or later version
https://support.industry.siemens.com/cs/ww/en/view/109478459/ - FixedSIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)siemens_psirt
Update to V3.1.5 or later version
https://support.industry.siemens.com/cs/ww/en/view/109478459/ - FixedSINEC NMSsiemens_psirt
Update to V3.0 or later version
https://support.industry.siemens.com/cs/ww/en/view/109973059/ - FixedSIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)cisa_csaf_ot
Update to V3.1.5 or later version
https://support.industry.siemens.com/cs/ww/en/view/109478459/ - FixedSIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)cisa_csaf_ot
Update to V3.1.5 or later version
https://support.industry.siemens.com/cs/ww/en/view/109478459/ - FixedSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)cisa_csaf_ot
Update to V3.1.5 or later version
https://support.industry.siemens.com/cs/ww/en/view/109478459/ - FixedSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)cisa_csaf_ot
Update to V3.1.5 or later version
https://support.industry.siemens.com/cs/ww/en/view/109478459/ - FixedSIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)cisa_csaf_ot
Update to V3.1.5 or later version
https://support.industry.siemens.com/cs/ww/en/view/109478459/ - FixedSINEC NMScisa_csaf_ot
Update to V3.0 or later version
https://support.industry.siemens.com/cs/ww/en/view/109973059/ - FixedRTU500 series CMU Firmwarecisa_csaf_ot
Update to CMU Firmware version 13.7.7
- MitigationSIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)cisa_csaf_ot
Only build and run applications from trusted sources.
- MitigationSIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)cisa_csaf_ot
Only build and run applications from trusted sources.
- MitigationSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)cisa_csaf_ot
Only build and run applications from trusted sources.
- MitigationSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)cisa_csaf_ot
Only build and run applications from trusted sources.
- MitigationSIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)cisa_csaf_ot
Only build and run applications from trusted sources.
- MitigationRTU500 series CMU Firmwarecisa_csaf_ot
Follow general mitigation factors/workarounds.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.5–7.5
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
exploits (2)
Public proof-of-concept and weaponised exploit code.
- RenukaSelvar/expat_CVE-2024-28757RenukaSelvar/expat_CVE-2024-28757PoC · poc_in_github
- saurabh2088/expat_2_1_0_CVE-2024-28757saurabh2088/expat_2_1_0_CVE-2024-28757PoC · poc_in_github
affected products (78)
Products and version ranges known to be affected.
- NetApp ActiveIQ Unified Manager for VMware vSphereall versionscert_bundDEcpe:/a:netapp:active_iq_unified_manager:for_vmware_vsphere
advisories (13)
Vendor and ecosystem advisories describing this.
- NCSC-2024-0332Kwetsbaarheden verholpen in Siemens productenNL2024-08-13csaf · ncsc_nlNL
Siemens heeft kwetsbaarheden verholpen in diverse producten als COMOS, INTRALOG, LOGO!, NX, SCALANCE, SINEC en Teamcenter.
- NCSC-2025-0020Kwetsbaarheden verholpen in Oracle Database productenNL2025-01-22csaf · ncsc_nlNL
Oracle heeft kwetsbaarheden verholpen in diverse database producten en subsystemen, zoals de Core Database, Graal, Application Express, GoldenGate en REST data.
- SSA-398330SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.52023-12-12csaf · siemens_psirtDE
Multiple vulnerabilities have been identified in the additional GNU/Linux subsystem of the firmware version >= V3.1.0 and < V3.1.5 for the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP (incl. SIPLUS variant). These GNU/Linux vulnerabilities have been externally identified. Siemens has released new versions for the affected products and recommends to update to the latest versions. SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5 are no longer maintained and there won't be any update to the CVE list anymore. Please update to the latest version. Note: This SSA advises vulnerabilities for firmware version V3.1 only; for versions < V3.1 refer to Siemens Security Bulletin SSB-439005 (https://cert-portal.siemens.com/productcert/html/ssb-439005.html).
- SSA-784301SSA-784301: Multiple Vulnerabilities in SINEC NMS Before V3.02024-08-13csaf · siemens_psirtDE
SINEC NMS before V3.0 is affected by multiple vulnerabilities. Siemens has released a new version for SINEC NMS and recommends to update to the latest version.
- WID-SEC-W-2024-0591expat: Schwachstelle ermöglicht Denial of ServiceDeutsch2024-03-10csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in expat ausnutzen, um einen Denial of Service Angriff durchzuführen.
- WID-SEC-W-2024-1360IBM DB2: Mehrere SchwachstellenDeutsch2024-06-11csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in IBM DB2 ausnutzen, um einen Denial of Service Angriff durchzuführen, beliebigen Code auszuführen und vertrauliche Informationen offenzulegen.
- WID-SEC-W-2024-1474Red Hat OpenShift Container Platform: Mehrere SchwachstellenDeutsch2024-06-27csaf · cert_bundDE
Ein entfernter, anonymer oder lokaler Angreifer kann mehrere Schwachstellen in Red Hat OpenShift ausnutzen, um einen Denial-of-Service-Zustand zu erzeugen, vertrauliche Informationen offenzulegen oder Daten zu manipulieren.
- WID-SEC-W-2024-3377Dell PowerProtect Data Domain: Mehrere SchwachstellenDeutsch2024-11-07csaf · cert_bundDE
Ein lokaler Angreifer kann mehrere Schwachstellen in Dell PowerProtect Data Domain ausnutzen, um seine Privilegien zu erhöhen, Informationen offenzulegen und um nicht näher beschriebene Auswirkungen zu erzielen.
- WID-SEC-W-2026-2355Dell integrated Dell Remote Access Controller: Mehrere SchwachstellenDeutsch2026-07-14csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Dell integrated Dell Remote Access Controller ausnutzen, um einen Denial-of-Service auszulösen, Informationen offenzulegen, Sicherheitsmaßnahmen zu umgehen und potentiell Code auszuführen.
- WID-SEC-W-2026-2912Dell PowerScale OneFS: Mehrere SchwachstellenDeutsch2026-08-18csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Dell PowerScale OneFS ausnutzen, um beliebigen Programmcode auszuführen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, und um Daten zu manipulieren.
- ICSA-23-348-10Siemens SIMATIC S7-15002023-12-12icsa · cisa_csaf_otUS
Multiple vulnerabilities have been identified in the additional GNU/Linux subsystem of the firmware version >= V3.1.0 and < V3.1.5 for the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP (incl. SIPLUS variant). These GNU/Linux vulnerabilities have been externally identified. Siemens has released new versions for the affected products and recommends to update to the latest versions. Note: This SSA advises vulnerabilities for firmware version V3.1 only; for versions < V3.1 refer to Siemens Security Bulletin SSB-439005 ( https://cert-portal.siemens.com/productcert/html/ssb-439005.html).
- ICSA-24-228-06Siemens SINEC NMS2024-08-13icsa · cisa_csaf_otUS
SINEC NMS before V3.0 is affected by multiple vulnerabilities. Siemens has released a new version for SINEC NMS and recommends to update to the latest version.
- ICSA-25-259-02Hitachi Energy RTU500 Series2025-09-09icsa · cisa_csaf_otUS
Hitachi Energy is aware of multiple vulnerabilities that affect the RTU500 versions that are listed below. An attacker successfully exploiting these vulnerabilities could potentially cause Denial of Service (DoS) impact on RTU500. Please refer to the Recommended Immediate Actions for information about the available mitigation/remediation strategies.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (24)
External citations — patches, advisories, analysis.
- https://access.redhat.com/security/cve/cve-2024-28757cnnvd
- https://cxsecurity.com/cveshow/CVE-2024-28757/cnnvd
- https://github.com/libexpat/libexpat/issues/839cnnvd
- https://github.com/libexpat/libexpat/pull/842cnnvd
- https://vigilance.fr/vulnerability/Expat-overload-via-XML-ExternalEntityParserCreate-43783cnnvd
- http://www.openwall.com/lists/oss-security/2024/03/15/1enisa_euvd
- https://github.com/libexpat/libexpat/issues/839enisa_euvd
- https://github.com/libexpat/libexpat/pull/842enisa_euvd
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