Back to CVE records
Medium 6.5Published Sep 4, 2019
CVE-2019-15903In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to document parsing too early; a consecutive call to XML_GetCurrentLineNumber (or XML_GetCurrentColumn…
Updated under an hour ago ()
Does this affect you?
It affects Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP and 4 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Start free and add your stack
Free account, 1 product
In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to document parsing too early; a consecutive call to XML_GetCurrentLineNumber (or XML_GetCurrentColumnNumber) then resulted in a heap-based buffer over-read.
- CVSS
- 6.5 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-125
- 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 2.2.8 | NVD |
python python python:python | from 2.7.0 before 2.7.17; from 3.5.0 before 3.5.8; from 3.6.0 before 3.6.10; from 3.7.0 before 3.7.5 | NVD |
References
- https://usn.ubuntu.com/4132-1/vendor-advisory, x-refsource-ubuntu
- https://seclists.org/bugtraq/2019/Sep/30mailing-list, x-refsource-bugtraq
- https://usn.ubuntu.com/4132-2/vendor-advisory, x-refsource-ubuntu
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BDUTI5TVQWIGGQXPEVI4T2ENHFSBMIBP/vendor-advisory, x-refsource-fedora
- https://www.debian.org/security/2019/dsa-4530vendor-advisory, x-refsource-debian
- https://seclists.org/bugtraq/2019/Sep/37mailing-list, x-refsource-bugtraq
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A4TZKPJFTURRLXIGLB34WVKQ5HGY6JJA/vendor-advisory, x-refsource-fedora
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00081.htmlvendor-advisory, x-refsource-suse, mailing-list, third-party-advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00080.htmlvendor-advisory, x-refsource-suse, mailing-list, third-party-advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S26LGXXQ7YF2BP3RGOWELBFKM6BHF6UG/vendor-advisory, x-refsource-fedora
- https://seclists.org/bugtraq/2019/Oct/29mailing-list, x-refsource-bugtraq
- https://usn.ubuntu.com/4165-1/vendor-advisory, x-refsource-ubuntu
- https://www.debian.org/security/2019/dsa-4549vendor-advisory, x-refsource-debian
- https://access.redhat.com/errata/RHSA-2019:3210vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2019:3237vendor-advisory, x-refsource-redhat, third-party-advisory
- https://seclists.org/bugtraq/2019/Nov/1mailing-list, x-refsource-bugtraq
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00000.htmlvendor-advisory, x-refsource-suse, mailing-list, third-party-advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00002.htmlvendor-advisory, x-refsource-suse, mailing-list, third-party-advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00003.htmlvendor-advisory, x-refsource-suse, mailing-list, third-party-advisory
- https://access.redhat.com/errata/RHSA-2019:3756vendor-advisory, x-refsource-redhat, third-party-advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00013.htmlvendor-advisory, x-refsource-suse, mailing-list, third-party-advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00016.htmlvendor-advisory, x-refsource-suse, mailing-list, third-party-advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00018.htmlvendor-advisory, x-refsource-suse, mailing-list, third-party-advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00017.htmlvendor-advisory, x-refsource-suse, mailing-list, third-party-advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00019.htmlvendor-advisory, x-refsource-suse, mailing-list, third-party-advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00008.htmlmailing-list, third-party-advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.htmlmailing-list, third-party-advisory
- http://packetstormsecurity.com/files/154503/Slackware-Security-Advisory-expat-Updates.htmlthird-party-advisory, vdb-entry
- http://packetstormsecurity.com/files/154927/Slackware-Security-Advisory-python-Updates.htmlthird-party-advisory, vdb-entry
- http://packetstormsecurity.com/files/154947/Slackware-Security-Advisory-mozilla-firefox-Updates.htmlthird-party-advisory, vdb-entry
- http://seclists.org/fulldisclosure/2019/Dec/23mailing-list, third-party-advisory
- http://seclists.org/fulldisclosure/2019/Dec/26mailing-list, third-party-advisory
- http://seclists.org/fulldisclosure/2019/Dec/27mailing-list, third-party-advisory
- http://seclists.org/fulldisclosure/2019/Dec/30mailing-list, third-party-advisory
- https://github.com/libexpat/libexpat/commit/c20b758c332d9a13afbbb276d30db1d183a85d43patch, third-party-advisory
- https://github.com/libexpat/libexpat/issues/317exploit, issue-tracking, third-party-advisory
- https://github.com/libexpat/libexpat/issues/342third-party-advisory
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.