Microsoft Exchange Server 2013/2016/2019 PowerShell ProxyNotShell deserialization

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.1$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Microsoft Exchange Server 2013/2016/2019. Affected is an unknown function of the component PowerShell Handler. The manipulation leads to an unknown weakness. This vulnerability is documented as CVE-2022-41082. The attack can be initiated remotely. Additionally, an exploit exists. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in Microsoft Exchange Server 2013/2016/2019 (Groupware Software) and classified as critical. This issue affects an unknown code of the component PowerShell Handler. Using CWE to declare the problem leads to CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. Impacted is confidentiality, integrity, and availability.

The weakness was released 09/30/2022 (Website). It is possible to read the advisory at msrc-blog.microsoft.com. The identification of this vulnerability is CVE-2022-41082. Technical details are unknown but a public exploit is available.

The exploit is available at github.com. It is declared as attacked. We expect the 0-day to have been worth approximately $5k-$25k. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 09/30/2022 with a due date of 10/21/2022:

Apply updates per vendor instructions.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at portal.msrc.microsoft.com.

The vulnerability is also documented in the vulnerability database at Zero-Day.cz (722). kb.cert.org is providing further details. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.1

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 8.0
Vendor Vector (Microsoft): 🔍

CNA Base Score: 8.0
CNA Vector (Microsoft Corporation): 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Deserialization
CWE: CWE-502 / CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Attacked
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Zero-Day.cz: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: portal.msrc.microsoft.com

Timelineinfo

09/19/2022 🔍
09/30/2022 +11 days 🔍
09/30/2022 +0 days 🔍
10/30/2025 +1126 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: msrc-blog.microsoft.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2022-41082 (🔍)
GCVE (CVE): GCVE-0-2022-41082
GCVE (VulDB): GCVE-100-210011
scip Labs: https://www.scip.ch/en/?labs.20161013
Misc.: 🔍

Entryinfo

Created: 09/30/2022 11:19
Updated: 10/30/2025 22:55
Changes: 09/30/2022 11:19 (37), 10/05/2022 15:35 (1), 10/29/2022 08:16 (2), 10/29/2022 08:20 (12), 11/19/2022 20:41 (2), 01/04/2023 20:18 (23), 04/27/2024 18:36 (23), 06/16/2024 18:19 (2), 06/29/2024 03:08 (6), 09/25/2024 12:29 (1), 01/03/2025 08:28 (1), 10/30/2025 22:55 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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