What is CVE-2022-41082?

CVE-2022-41082 is a high-severity vulnerability in Microsoft Exchange Server, classified under Deserialization of Untrusted Data. CVSS score: 8.0/10. Published 2022-10-03.

How severe is CVE-2022-41082?

High severity. CVSS v3 base score is 8.0 out of 10.

Is CVE-2022-41082 known to be exploited?

Yes. CVE-2022-41082 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-09-30), indicating it is being actively exploited. 63 public proof-of-concept repositories are indexed.

Deserialization in Microsoft Exchange Server

CVE-2022-41082

Microsoft Exchange Server Remote Code Execution Vulnerability

Vulnerability class: Insecure Deserialization

Published 2022-10-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 1.000 (100.0th percentile), scored 2026-10-05.

Very high probability of exploitation in the next 30 days — among the top 0.1% most-likely-to-be-exploited CVEs. 100th percentile — 100.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

The 30-day trend appears once there are two daily scores.

Affected products

Microsoft Exchange Server — versions 2013, 2016, 2019
Microsoft Exchange Server 2013 Cumulative Update 23 — versions 15.00.0
Microsoft Exchange Server 2016 Cumulative Update 22 — versions 15.0.0
Microsoft Exchange Server 2016 Cumulative Update 23 — versions 15.01.0
Microsoft Exchange Server 2019 Cumulative Update 11 — versions 15.02.0
Microsoft Exchange Server 2019 Cumulative Update 12 — versions 15.02.0

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-09-30. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-10-21.

Required action: Apply updates per vendor instructions.

Known ransomware campaign use: yes.

Public proof-of-concept exploits

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41082 (vendor-advisory, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Exploit, Third Party Advisory, VDB Entry)
af854a3a-2127-422b-91ae-364da2661108 (Patch, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Third Party Advisory, US Government Resource)
af854a3a-2127-422b-91ae-364da2661108 (Third Party Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Third Party Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Third Party Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2022-41082?: CVE-2022-41082 is a high-severity vulnerability in Microsoft Exchange Server, classified under Deserialization of Untrusted Data. CVSS score: 8.0/10. Published 2022-10-03.
How severe is CVE-2022-41082?: High severity. CVSS v3 base score is 8.0 out of 10.
Is CVE-2022-41082 known to be exploited?: Yes. CVE-2022-41082 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-09-30), indicating it is being actively exploited. 63 public proof-of-concept repositories are indexed.