CVE-2022-23267 [High] | Denial of Service in .net

CVE-2022-23267 is rated Moderate Risk (60.1/100): CVSS High severity, with high exploitation likelihood (EPSS 6.42%, 91th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-05-21	8.19%	6.42%	-1.77%
2	2026-01-21	6.42%	8.19%	+1.77%
3	2025-11-21	—	6.42%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-05-21

8.19%

6.42%

-1.77%

2026-01-21

6.42%

8.19%

+1.77%

2025-11-21

—

6.42%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.5	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	3.6	[email protected]
5.0	2.0	MEDIUM	`AV:N/AC:L/Au:N/C:N/I:N/A:P` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:N) No authentication is required. Confidentiality impact (C:N) No confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:P) Partial availability impact.	10.0	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.5

3.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

3.6

[email protected]

5.0

2.0

MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:L): Exploitation conditions are straightforward and predictable.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:N): No confidentiality impact.
Integrity impact (I:N): No integrity impact.
Availability impact (A:P): Partial availability impact.

10.0

2.9

[email protected]

OS Trackers for CVE-2022-23267

vendor	priority	summary	link
`redhat`	high	—	https://access.redhat.com/security/cve/CVE-2022-23267
`suse`	high	CVE-2022-23267 severity important: SUSE including 41 source package names (aspnetcore-runtime-3.1-3.1.25-1.el8_6, aspnetcore-runtime-5.0-5.0.17-1.el8_6, …), 41 product×package rows across 2 product lines (SUSE Liberty Linux 8, SUSE Liberty Linux 9): Fixed 41.	https://www.suse.com/security/cve/CVE-2022-23267/

Affected software / configurations for CVE-2022-23267

Vendor	Product	Version	Raw CPE
microsoft	.net	5.0	cpe:2.3:a:microsoft:.net:5.0:::::::*
microsoft	.net	6.0.0	cpe:2.3:a:microsoft:.net:6.0.0:-::::::
microsoft	.net_core	3.1	cpe:2.3:a:microsoft:.net_core:3.1:-::::::
microsoft	powershell	>= 7.0, < 7.0.11	cpe:2.3:a:microsoft:powershell::::::::
microsoft	powershell	>= 7.2, < 7.2.4	cpe:2.3:a:microsoft:powershell::::::::
microsoft	visual_studio_2019	>= 16.0, < 16.9.21	cpe:2.3:a:microsoft:visual_studio_2019::::::::
microsoft	visual_studio_2019	>= 16.10, < 16.11.14	cpe:2.3:a:microsoft:visual_studio_2019::::::::
microsoft	visual_studio_2022	17.0	cpe:2.3:a:microsoft:visual_studio_2022:17.0:::::::*
microsoft	visual_studio_2022	17.1	cpe:2.3:a:microsoft:visual_studio_2022:17.1:::::::*
fedoraproject	fedora	34	cpe:2.3:o:fedoraproject:fedora:34:::::::*
fedoraproject	fedora	35	cpe:2.3:o:fedoraproject:fedora:35:::::::*
fedoraproject	fedora	36	cpe:2.3:o:fedoraproject:fedora:36:::::::*

References for CVE-2022-23267

URL	Tags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-23267
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GNXQL7EZORGU4PZCPJ5EPQ4P7IEY3ZZO/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IBYSBUDJYQ76HK4TULXVIIPCKK2U6WDB/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W5FPEQ6BTYRGTS6IYCDTZW6YF5HLQ3BY/
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-23267	Patch Vendor Advisory

URL

CVE-2022-23267 | .NET and Visual Studio Denial of Service Vulnerability

Exploit prediction scoring system (EPSS) score for CVE-2022-23267

Common vulnerability scoring system (CVSS) metrics for CVE-2022-23267

Weakness enumeration for CVE-2022-23267

GitHub Security Advisory for CVE-2022-23267

OS Trackers for CVE-2022-23267

Affected software / configurations for CVE-2022-23267

References for CVE-2022-23267