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CVE-2021-3997: systemd from 240 (inclusive), before 250.2 (exclusive), Fixed in v251-rc1; +5 more affected products
CVE-2021-3997. CVSS 3.1 base score 5.5 (MEDIUM, NVD). EPSS 0.01694 (percentile 0.7653), scored 13-Oct-2026.
Affected technology
systemd · from 240 (inclusive), before 250.2 (exclusive)
systemd project
fedora · 34
fedoraproject
fedora · 35
fedoraproject
enterprise linux · 7.0
redhat
enterprise linux · 8.0
redhat
enterprise linux · 9.0
redhat
systemd · Fixed in v251-rc1
Vendor not specified by the source
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · V3.1.0 to before V3.1.5
Siemens
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP · V3.1.0 to before V3.1.5
Siemens
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · V3.1.0 to before V3.1.5
Siemens
Component: Not specified by the source
Attack conditions (NVD, CVSS 3.1): Local · Low privileges required · No user interaction required
What an attacker can do
The source reports that an attacker could disrupt service under the conditions described by the source. NVD’s CVSS 3.1 assessment (base score 5.5/10) rates confidentiality and integrity impact as none; availability impact as high.
- CWE
- CWE-674
- CCR priority
- 22.4 /100 (P4)
- CVSS 3.1
- 5.5 /10 · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H · NVD
- EPSS
- 0.01694 · percentile 0.7653 · 2026-10-13
- KEV
- no
Provenance
- GitHub Advisory Database · Source record · observed 2026-10-14 16:01:16.619248+00:00 UTC
- NVD CVE API 2.0 · Source record · observed 2026-10-14 15:56:36.793806+00:00 UTC
Stable permalink: https://cybercodered.org/item/cve-cve-2021-3997.html