CVE-2022-23277

mediumpriority · attend · 50EPSS 0.411 · 99 %ileexploit · weaponizedEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

2 exploits · weaponized

Likely / severe?

41.1% (99th) EPSS

CVSS 6.5 · medium

Is it mine?

23 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · msrc_csaf

EPSS · scored 2026-10-27

Microsoft Exchange Server Remote Code Execution Vulnerability

remediations

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

A vendor fix is available.

FixedMicrosoft Exchange Server 2013 Cumulative Update 23msrc_csaf
15.00.1497.033:Security Update:https://support.microsoft.com/help/5010324
https://support.microsoft.com/help/5010324
FixedMicrosoft Exchange Server 2016 Cumulative Update 21msrc_csaf
15.01.2308.027:Security Update:https://support.microsoft.com/help/5012698
https://support.microsoft.com/help/5012698
FixedMicrosoft Exchange Server 2016 Cumulative Update 22msrc_csaf
15.01.2375.024:Security Update:https://support.microsoft.com/help/5012698
https://support.microsoft.com/help/5012698
FixedMicrosoft Exchange Server 2019 Cumulative Update 10msrc_csaf
15.02.0922.027:Security Update:https://support.microsoft.com/help/5012698
https://support.microsoft.com/help/5012698
FixedMicrosoft Exchange Server 2019 Cumulative Update 11msrc_csaf
15.02.0986.022:Security Update:https://support.microsoft.com/help/5012698
https://support.microsoft.com/help/5012698

cvss

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

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.5–8.8

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

v2.06.5mediumAV:N/AC:L/Au:S/C:P/I:P/A:P/E:Hsecondary · CVSS-BT (t0sche)

v3.18.8highAV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · secure@microsoft.com USexploitability 2.8 · impact 5.9

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · ENISA EU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · NVD / NIST USexploitability 2.8 · impact 5.9

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-94US

exploits (2)

Public proof-of-concept and weaponised exploit code.

exploit/windows/http/exchange_chainedserializationbinder_rceMicrosoft Exchange Server ChainedSerializationBinder RCEweaponized · metasploit
7BitsTeam/CVE-2022-23277CVE-2022-23277 POC to write a webshell to aspnet_clientPoC · poc_in_github

affected products (23)

Products and version ranges known to be affected.

Microsoft Microsoft Exchange Server 2013 Cumulative Update 2315.00.0 → 15.00.1497.033enisa_euvdEU
Microsoft Microsoft Exchange Server 2016 Cumulative Update 2115.01.0 → 15.01.2308.027enisa_euvdEU
Microsoft Microsoft Exchange Server 2016 Cumulative Update 2215.0.0 → 15.01.2375.024enisa_euvdEU
Microsoft Microsoft Exchange Server 2019 Cumulative Update 1015.02.0 → 15.02.0922.027enisa_euvdEU
Microsoft Microsoft Exchange Server 2019 Cumulative Update 1115.02.0 → 15.02.0986.022enisa_euvdEU
Microsoft Corp Microsoft Exchange Server≤ 2013 Cumulative Update 23fstec_bduRU
Microsoft Corp Microsoft Exchange Server≤ 2016 Cumulative Update 22fstec_bduRU
Microsoft Corp Microsoft Exchange Server≤ 2019 Cumulative Update 11fstec_bduRU
Microsoft Corp Microsoft Exchange Server≤ 2016 Cumulative Update 21fstec_bduRU
Microsoft Corp Microsoft Exchange Server≤ 2019 Cumulative Update 10fstec_bduRU
Microsoft Exchange Server 2013 Cumulative Update 23all versionsfixedmsrc_csafUS
Microsoft Exchange Server 2013 Cumulative Update 23< 15.00.1497.033msrc_csafUS
Microsoft Exchange Server 2016 Cumulative Update 21all versionsfixedmsrc_csafUS
Microsoft Exchange Server 2016 Cumulative Update 21< 15.01.2308.027msrc_csafUS
Microsoft Exchange Server 2016 Cumulative Update 22all versionsfixedmsrc_csafUS
Microsoft Exchange Server 2016 Cumulative Update 22< 15.01.2375.024msrc_csafUS
Microsoft Exchange Server 2019 Cumulative Update 10all versionsfixedmsrc_csafUS
Microsoft Exchange Server 2019 Cumulative Update 10< 15.02.0922.027msrc_csafUS
Microsoft Exchange Server 2019 Cumulative Update 11all versionsfixedmsrc_csafUS
Microsoft Exchange Server 2019 Cumulative Update 11< 15.02.0986.022msrc_csafUS

showing 20 of 23

advisories (1)

Vendor and ecosystem advisories describing this.

msrc_CVE-2022-23277Microsoft Exchange Server Remote Code Execution Vulnerability2022-03-08csaf · 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 CVE.org MITRE

published 2022-03-09modified 2026-06-17

references (9)

External citations — patches, advisories, analysis.

scry

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