CVE-2026-45186

highpriority · track · 30EPSS 0.005 · 40 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.48% (40th) EPSS

CVSS 7.5 · high

Is it mine?

27 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-22

In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized crafted XML input.

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 V3.1.6 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 V3.1.6 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 V3.1.6 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 V3.1.6 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 V3.1.6 or later version
https://support.industry.siemens.com/cs/ww/en/view/109478459/
MitigationSIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)siemens_psirt
Limit access to the interactive shell of the additional GNU/Linux subssytem to trusted personnel only.
MitigationSIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)siemens_psirt
Limit access to the interactive shell of the additional GNU/Linux subssytem to trusted personnel only.
MitigationSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)siemens_psirt
Limit access to the interactive shell of the additional GNU/Linux subssytem to trusted personnel only.
MitigationSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)siemens_psirt
Limit access to the interactive shell of the additional GNU/Linux subssytem to trusted personnel only.
MitigationSIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)siemens_psirt
Limit access to the interactive shell of the additional GNU/Linux subssytem to trusted personnel only.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 2.9–7.5

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.12.9lowCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · ENISA EU

v3.12.9lowCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · cve@mitre.org USexploitability 1.4 · impact 1.4

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondaryexploitability 3.9 · impact 3.6

v3.12.9lowCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · Siemens ProductCERT DE

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-407USCWE-407USCWE-407US

affected products (27)

Products and version ranges known to be affected.

Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
IBM AIX 7.3all versionscert_bundDEcpe:/o:ibm:aix:7.3
IBM Power Hardware Management Console V10.3.1050.0-V10.3.1064.1all versionscert_bundDEcpe:/a:ibm:hardware_management_console:v10.3.1050.0_-_v10.3.1064.1
IBM Power Hardware Management Console V11.1.1110.0-V11.1.1112.1all versionscert_bundDEcpe:/a:ibm:hardware_management_console:v11.1.1110.0_-_v11.1.1112.1
IBM QRadar SIEMall versionscert_bundDEcpe:/a:ibm:qradar_siem:-
IBM Rational ClearQuestall versionscert_bundDEcpe:/a:ibm:rational_clearquest:-
IBM Security Verify Accessall versionscert_bundDEcpe:/a:ibm:security_verify_access:-
IBM Tivoli Monitoringall versionscert_bundDEcpe:/a:ibm:tivoli_monitoring:-
IBM VIOS 4.1all versionscert_bundDEcpe:/a:ibm:vios:4.1
Microsoft Azure Linux azl3all versionscert_bundDEcpe:/o:microsoft:azure_linux:azl3
OpenBSD OpenBSD 7.8all versionscert_bundDEcpe:/a:openbsd:openbsd:7.8
OpenBSD OpenBSD 7.9all versionscert_bundDEcpe:/a:openbsd:openbsd:7.9
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
RESF Rocky Linuxall versionscert_bundDEcpe:/o:resf:rocky_linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
Open Source expat< 2.8.1cert_bundDE
libexpat project libexpat0 → 2.8.1enisa_euvdEU

showing 20 of 27

advisories (3)

Vendor and ecosystem advisories describing this.

SSA-082556SSA-082556: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1.52025-06-10csaf · siemens_psirtDE
Multiple vulnerabilities have been identified in the additional GNU/Linux subsystem of the firmware version V3.1.5 for the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP (incl. SIPLUS variant). Siemens has released new versions for several affected products and recommends to update to the latest versions. Siemens is preparing further fixes and recommends specific mitigations for products where fixes are not or not yet available. SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1.5 is 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 V3.1.5 only; for version V3.1.6 refer to SSA-019113.
WID-SEC-W-2026-1448expat: Schwachstelle ermöglicht Denial of ServiceDeutsch2026-05-10csaf · cert_bundDE
Ein lokaler Angreifer kann eine Schwachstelle in expat ausnutzen, um einen Denial of Service Angriff durchzuführen.
WID-SEC-W-2026-1685IBM HTTP Server: Mehrere SchwachstellenDeutsch2026-05-26csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in IBM HTTP Server ausnutzen, um beliebigen Programmcode auszuführen und um einen Denial of Service Angriff durchzuführen.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund siemens_psirt NVD CVE.org MITRE

published 2026-05-10modified 2026-09-16

references (16)

External citations — patches, advisories, analysis.

scry

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