CVE-2022-33633

mediumpriority · track · 27EPSS 0.023 · 83 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

2.33% (83rd) EPSS

CVSS 6.5 · medium

Is it mine?

15 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · msrc_csaf

EPSS · scored 2026-10-27

Skype for Business and Lync Remote Code Execution Vulnerability

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedMicrosoft Lync Server 2013 CU10msrc_csaf
8308.1198:Security Update:https://support.microsoft.com/help/5016714
https://support.microsoft.com/help/5016714
FixedSkype for Business Server 2015 CU12msrc_csaf
9319.634:Security Update:https://support.microsoft.com/help/5016714
https://support.microsoft.com/help/5016714
FixedSkype for Business Server 2019 CU6msrc_csaf
2046.404:Security Update:https://support.microsoft.com/help/5016714
https://support.microsoft.com/help/5016714

cvss

Technical severity, 0–10. One row per scoring source.

7.2

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.5–7.2

v2.06.5mediumAV:N/AC:L/Au:S/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8 · impact 6.4

v3.17.2highAV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17.2highCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · ENISA EU

v3.17.2highCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hsecondary · secure@microsoft.com USexploitability 1.2 · impact 5.9

v3.16.6mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.17.2highCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20US

affected products (15)

Products and version ranges known to be affected.

Microsoft Microsoft Lync Server 2013 CU108308.0 → 8308.1198enisa_euvdEU
Microsoft Skype for Business Server 2015 CU129319.0 → 9319.634enisa_euvdEU
Microsoft Skype for Business Server 2019 CU62046.0 → 2046.404enisa_euvdEU
Microsoft Corp Microsoft Lync Server≤ 2013 CU10fstec_bduRU
Microsoft Corp Skype for Business Server≤ 2015 CU12fstec_bduRU
Microsoft Corp Skype for Business Server≤ 2019 CU6fstec_bduRU
Microsoft Lync Server 2013 CU10all versionsfixedmsrc_csafUS
Microsoft Lync Server 2013 CU10< 8308.1198msrc_csafUS
Skype for Business Server 2015 CU12all versionsfixedmsrc_csafUS
Skype for Business Server 2015 CU12< 9319.634msrc_csafUS
Skype for Business Server 2019 CU6all versionsfixedmsrc_csafUS
Skype for Business Server 2019 CU6< 2046.404msrc_csafUS
microsoft lync server= 2013nvdUScpe:2.3:a:microsoft:lync_server:*:*:*:*:*:*:*:*
microsoft skype for business= 2015nvdUScpe:2.3:a:microsoft:skype_for_business:*:*:*:*:*:*:*:*
microsoft skype for business= 2019nvdUScpe:2.3:a:microsoft:skype_for_business:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

msrc_CVE-2022-33633Skype for Business and Lync Remote Code Execution Vulnerability2022-07-12csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu msrc_csaf nvd NVD CVE.org MITRE

published 2022-07-12modified 2026-06-17

references (7)

External citations — patches, advisories, analysis.

scry

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