# CVE-2022-41080 — Microsoft Exchange Server 2013 Cumulative Update 23

**CISA KEV** · **Ransomware**

> As of 2026-11-05, CVE-2022-41080 is a HIGH-severity vulnerability in Microsoft Exchange Server 2013 Cumulative Update 23, CVSS v3.1 8.8, EPSS 77.3% (99.5th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-01-10), with a US federal remediation deadline of 2023-01-31, and CISA links it to known ransomware campaigns. Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2022-41080, most recently “PLAY Ransomware (PlayCrypt) - Reverse Engineering Analysis and Big Game Hunting Operations”.

**Last updated:** 2026-08-10

## What is CVE-2022-41080?

Microsoft Exchange Server Elevation of Privilege Vulnerability

Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 5 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 1461 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 8.8 — HIGH (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C`)
- **EPSS (FIRST):** 77.3% probability of exploitation in the next 30 days, higher than 99.5% of all scored CVEs
- **CISA KEV:** Listed since 2023-01-10, federal remediation deadline 2023-01-31 — used in known ransomware campaigns
- **Threadlinqs priority:** 10/10 — CISA lists it as used in ransomware, which Threadlinqs scores at the maximum
- **Published:** 2022-11-09, last modified 2026-08-10

## Is CVE-2022-41080 being exploited?

CISA added CVE-2022-41080 to the Known Exploited Vulnerabilities catalog on 2023-01-10, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2023-01-31 under BOD 22-01. CISA flags the vulnerability as one used in known ransomware campaigns. Weaponised exploit code for CVE-2022-41080 is publicly available. 2 public proof-of-concept repositories are tracked for this identifier. It currently carries a trending score of 48 in the Threadlinqs vulnerability feed.

- [ohnonoyesyes/CVE-2022-41080](https://github.com/ohnonoyesyes/CVE-2022-41080) (github)
- [trickest/cve](https://github.com/trickest/cve/blob/main/2022/CVE-2022-41080.md) (trickest)

## Affected products and versions

- [Microsoft](https://intel.threadlinqs.com/vendors/microsoft): Exchange Server 2013 Cumulative Update 23, Exchange Server 2016 Cumulative Update 22, Exchange Server 2016 Cumulative Update 23, Exchange Server 2019 Cumulative Update 11, Exchange Server 2019 Cumulative Update 12

## How to fix CVE-2022-41080

The record marks a vendor fix as available for CVE-2022-41080. Patch reference: [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41080](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41080). Because CVE-2022-41080 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2023-01-31. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

## Threat activity tracking CVE-2022-41080

1 tracked threat in the Threadlinqs corpus references CVE-2022-41080, either in the campaign’s CVE list or as an indicator on the campaign record.

- [PLAY Ransomware (PlayCrypt) - Reverse Engineering Analysis and Big Game Hunting Operations](https://intel.threadlinqs.com/threat/TL-2026-5283) — HIGH · 2026-11-05

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, CISA KEV, public proof-of-concept repositories. Last verified by Threadlinqs on 2026-11-05. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [msrc.microsoft.com — vendor advisory](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41080)

Canonical: https://intel.threadlinqs.com/cve/CVE-2022-41080
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