Medium 6.1Published May 10, 2021

CVE-2020-13529An exploitable denial-of-service vulnerability exists in Systemd 245.

Updated under an hour ago (Oct 27, 2026, 7:40 PM ET)

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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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Every CVE for Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP

Exploited in the last 30 days

An exploitable denial-of-service vulnerability exists in Systemd 245. A specially crafted DHCP FORCERENEW packet can cause a server running the DHCP client to be vulnerable to a DHCP ACK spoofing attack. An attacker can forge a pair of FORCERENEW and DCHP ACK packets to reconfigure the server.

CVSS: 6.1 MEDIUM (v3.0, CNA)CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
Weakness (CWE): CWE-290
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: talos
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 14, 2026

Affected products

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
systemd_project systemd systemd_project:systemd	245	NVD
fedoraproject fedora fedoraproject:fedora	33	NVD
netapp active_iq_unified_manager netapp:active_iq_unified_manager	all versions	NVD
netapp cloud_backup netapp:cloud_backup	all versions	NVD

References

References

https://talosintelligence.com/vulnerability_reports/TALOS-2020-1142	x-refsource-misc, exploit, third-party-advisory
https://security.gentoo.org/glsa/202107-48	vendor-advisory, x-refsource-gentoo, third-party-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/42TMJVNYRY65B4QCJICBYOEIVZV3KUYI/	vendor-advisory, x-refsource-fedora
http://www.openwall.com/lists/oss-security/2021/08/04/2	mailing-list, x-refsource-mlist, third-party-advisory
http://www.openwall.com/lists/oss-security/2021/08/17/3	mailing-list, x-refsource-mlist, third-party-advisory
http://www.openwall.com/lists/oss-security/2021/09/07/3	mailing-list, x-refsource-mlist, third-party-advisory
https://security.netapp.com/advisory/ntap-20210625-0005/	x-refsource-confirm, third-party-advisory
https://cert-portal.siemens.com/productcert/html/ssa-398330.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.