High 7.5Published Nov 14, 2021

CVE-2021-43618GNU Multiple Precision Arithmetic Library (GMP) through 6.2.1 has an mpz/inp_raw.c integer overflow and resultant buffer overflow via crafted input, leading to a segmentation fault on 32-bit platform…

Updated under an hour ago (Oct 27, 2026, 11:40 AM ET)

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

Exploited in the last 30 days

GNU Multiple Precision Arithmetic Library (GMP) through 6.2.1 has an mpz/inp_raw.c integer overflow and resultant buffer overflow via crafted input, leading to a segmentation fault on 32-bit platforms.

CVSS: 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
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

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
gmplib gmp gmplib:gmp	through 6.2.1	NVD
debian debian_linux debian:debian_linux	9.0	NVD
netapp active_iq_unified_manager netapp:active_iq_unified_manager	all versions	NVD
netapp h300s_firmware netapp:h300s_firmware	all versions	NVD
netapp h500s_firmware netapp:h500s_firmware	all versions	NVD
netapp h700s_firmware netapp:h700s_firmware	all versions	NVD
netapp h410s_firmware netapp:h410s_firmware	all versions	NVD
1–10 of 11

References

References

https://gmplib.org/list-archives/gmp-bugs/2021-September/005077.html	exploit, third-party-advisory
https://bugs.debian.org/994405	mailing-list, third-party-advisory
https://gmplib.org/repo/gmp-6.2/rev/561a9c25298e	patch, third-party-advisory
https://lists.debian.org/debian-lts-announce/2021/12/msg00001.html	mailing-list, third-party-advisory
http://www.openwall.com/lists/oss-security/2022/10/13/3	mailing-list, third-party-advisory
http://seclists.org/fulldisclosure/2022/Oct/8	mailing-list, third-party-advisory
https://security.netapp.com/advisory/ntap-20221111-0001/	third-party-advisory
https://security.gentoo.org/glsa/202309-13	vendor-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.