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High 8.8Published Jan 1, 2022
CVE-2021-45960In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memo…
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It affects Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP and 10 other products. Add what you run to find out whether that includes you.
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In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memory).
- CVSS
- 8.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-682
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- mitre
- NVD analysis
- Modified
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 14, 2026
Affected products
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
libexpat_project libexpat libexpat_project:libexpat | before 2.4.3 | NVD |
tenable nessus tenable:nessus | before 8.15.3; from 10.0.0 before 10.1.1 | NVD |
debian debian_linux debian:debian_linux | 10.0; 11.0 | NVD |
siemens sinema_remote_connect_server siemens:sinema_remote_connect_server | before 3.1 | NVD |
netapp active_iq_unified_manager netapp:active_iq_unified_manager | all versions | NVD |
netapp hci_baseboard_management_controller netapp:hci_baseboard_management_controller | h610c; h610s; h615c | NVD |
netapp oncommand_workflow_automation netapp:oncommand_workflow_automation | all versions | NVD |
netapp solidfire_&_hci_management_node netapp:solidfire_&_hci_management_node | all versions | NVD |
References
- https://github.com/libexpat/libexpat/issues/531x-refsource-misc, exploit, issue-tracking, patch, third-party-advisory
- https://github.com/libexpat/libexpat/pull/534x-refsource-misc, patch, third-party-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1217609x-refsource-misc, issue-tracking, permissions-required, third-party-advisory
- http://www.openwall.com/lists/oss-security/2022/01/17/3mailing-list, x-refsource-mlist, exploit, third-party-advisory
- https://security.netapp.com/advisory/ntap-20220121-0004/x-refsource-confirm, third-party-advisory
- https://www.tenable.com/security/tns-2022-05x-refsource-confirm, third-party-advisory
- https://www.debian.org/security/2022/dsa-5073vendor-advisory, x-refsource-debian, issue-tracking, third-party-advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdfx-refsource-confirm, patch, third-party-advisory
- https://security.gentoo.org/glsa/202209-24vendor-advisory, x-refsource-gentoo, third-party-advisory
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://cert-portal.siemens.com/productcert/html/ssa-484086.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.