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High 8.8Published Jan 8, 2022
CVE-2022-22827storeAtts in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.
Updated under an hour ago ()
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It affects Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP and 6 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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storeAtts in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.
- CVSS
- 8.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-190
- 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 |
References
- https://github.com/libexpat/libexpat/pull/539x-refsource-misc, third-party-advisory
- http://www.openwall.com/lists/oss-security/2022/01/17/3mailing-list, x-refsource-mlist, 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, third-party-advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdfx-refsource-confirm, 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.