CVE-2022-23277

HIGHNVD 8.88.8—Weaponized

8.8

Microsoft Exchange Server Remote Code Execution Vulnerability

CVSS v3: 8.8
EG Score: 8.8(medium)
EPSS: 99.1%
KEV: Not listed

Published

March 9, 2022

Last Modified

November 21, 2024

References (2)

secure@microsofthttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-23277
af854a3a-2127-422b-91ae-364da2661108https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-23277

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Microsoft MSRCCVE-2022-232772022-03-08
Microsoft Exchange Server Remote Code Execution Vulnerability

Data Freshness Timeline

(refreshed 11× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:15 UTCEPSS rescore
2026-06-08 14:15 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 06:09 UTCEPSS rescore
2026-06-05 06:09 UTCEPSS rescore
2026-06-04 13:11 UTCEPSS rescore
2026-06-04 13:11 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 00:15 UTCEPSS rescore

Publicly available exploits

(2 references)

Working exploit code is in the public domain (1 Metasploit module) (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

GitHub PoC7BitsTeam/CVE-2022-23277
First seen Oct 13, 2022
CVE-2022-23277 POC to write a webshell to aspnet_client
Open source ↗
Metasploitexploit/windows/http/exchange_chainedserializationbinder_rce✓ verified
First seen Dec 9, 2021
Microsoft Exchange Server ChainedSerializationBinder RCE
Open source ↗

Frequently asked(5)

What is CVE-2022-23277?

CVE-2022-23277 is a high vulnerability published on March 9, 2022. Microsoft Exchange Server Remote Code Execution Vulnerability

When was CVE-2022-23277 disclosed?

CVE-2022-23277 was first published in the National Vulnerability Database on March 9, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2022-23277 actively exploited?

CVE-2022-23277 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2022-23277?

CVE-2022-23277 has a CVSS v3 base score of 8.8 (NVD).

How do I remediate CVE-2022-23277?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-23277, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2022-23277

📅 Published

🔄 Last Modified

🔗 References (2)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2022-23277?

🔗 Related CVEs(same vendor)

Same vendor

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same vendor)