System	Score	Found at
cvssv3	8.1	https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-23017.json
epss	0.73544	https://api.first.org/data/v1/epss?cve=CVE-2021-23017
epss	0.73544	https://api.first.org/data/v1/epss?cve=CVE-2021-23017
epss	0.73544	https://api.first.org/data/v1/epss?cve=CVE-2021-23017
epss	0.73544	https://api.first.org/data/v1/epss?cve=CVE-2021-23017
epss	0.73544	https://api.first.org/data/v1/epss?cve=CVE-2021-23017
cvssv3.1	8.1	https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
generic_textual	medium	https://mailman.nginx.org/pipermail/nginx-announce/2021/000300.html
archlinux	Medium	https://security.archlinux.org/AVG-1987
archlinux	Medium	https://security.archlinux.org/AVG-1988

Reference id	Reference type	URL
		https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-23017.json
		https://api.first.org/data/v1/epss?cve=CVE-2021-23017
		https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23017
		https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
		https://mailman.nginx.org/pipermail/nginx-announce/2021/000300.html
		https://nginx.org/download/patch.2021.resolver.txt
		https://nginx.org/download/patch.2021.resolver.txt.asc
1963121		https://bugzilla.redhat.com/show_bug.cgi?id=1963121
989095		https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=989095
ASA-202106-36		https://security.archlinux.org/ASA-202106-36
ASA-202106-48		https://security.archlinux.org/ASA-202106-48
AVG-1987		https://security.archlinux.org/AVG-1987
AVG-1988		https://security.archlinux.org/AVG-1988
CVE-2021-23017	Exploit	https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/remote/50973.py
CVE-2021-23017		https://nvd.nist.gov/vuln/detail/CVE-2021-23017
GLSA-202105-38		https://security.gentoo.org/glsa/202105-38
RHSA-2021:2258		https://access.redhat.com/errata/RHSA-2021:2258
RHSA-2021:2259		https://access.redhat.com/errata/RHSA-2021:2259
RHSA-2021:2278		https://access.redhat.com/errata/RHSA-2021:2278
RHSA-2021:2290		https://access.redhat.com/errata/RHSA-2021:2290
RHSA-2021:3653		https://access.redhat.com/errata/RHSA-2021:3653
RHSA-2021:3851		https://access.redhat.com/errata/RHSA-2021:3851
RHSA-2021:3925		https://access.redhat.com/errata/RHSA-2021:3925
RHSA-2022:0323		https://access.redhat.com/errata/RHSA-2022:0323
USN-4967-1		https://usn.ubuntu.com/4967-1/
USN-4967-2		https://usn.ubuntu.com/4967-2/

Data source	Exploit-DB
Date added	July 11, 2022
Description	Nginx 1.20.0 - Denial of Service (DOS)
Ransomware campaign use	Unknown
Source publication date	July 11, 2022
Exploit type	remote
Platform	multiple
Source update date	July 11, 2022

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-23017.json

Attack Vector (AV)	Attack Complexity (AC)	Privileges Required (PR)	User Interaction (UI)	Scope (S)	Confidentiality Impact (C)	Integrity Impact (I)	Availability Impact (A)
network adjacent_network local physical	low high	none low high	none required	unchanged changed	high low none	high low none	high low none

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml

Attack Vector (AV)	Attack Complexity (AC)	Privileges Required (PR)	User Interaction (UI)	Scope (S)	Confidentiality Impact (C)	Integrity Impact (I)	Availability Impact (A)
network adjacent_network local physical	low high	none low high	none required	unchanged changed	high low none	high low none	high low none

Percentile	0.98794
EPSS Score	0.73544
Published At	April 2, 2026, 12:55 p.m.

Date	Actor	Action	Source	VulnerableCode Version
2026-04-01T12:31:46.343412+00:00	Nginx Importer	Import	https://nginx.org/en/security_advisories.html	38.0.0