CVE-2022-33633Network attack vector

Authenticated remote code execution

Published Jul 12, 2022 · Updated Jul 8, 2025

Remote code execution in Microsoft Skype for Business Server and Lync Server allows remote authenticated users to execute code via network requests. Microsoft has not published the affected component, request field, or incorrect operation that enables code execution. Exploitation requires high privileges on the target service and can compromise confidentiality, integrity, and availability.

CVSS severity7.2
High
EPSS probability2.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in Microsoft Skype for Business Server and Lync Server allows remote authenticated users to execute code via network requests. Microsoft has not published the affected component, request field, or incorrect operation that enables code execution. Exploitation requires high privileges on the target service and can compromise confidentiality, integrity, and availability.

The record

CVE
CVE-2022-33633
Published
Jul 12, 2022
Updated
Jul 8, 2025
Vendor
Microsoft
Product
Skype for Business Server
Classifications
Unavailable
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 12, 2022CVE publishedPublication date reported by the CVE source.
  2. Jul 8, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2046.0 <2046.404
  2. Affected versionversion=9319.0 <9319.634

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Microsoft · Skype for Business Serverversion=2046.0 <2046.404; version=9319.0 <9319.634
Microsoft · Microsoft Lync Serverversion=8308.0 <8308.1198

Published CVSS scores

7.2MicrosoftCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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