CVE-2021-31196

HIGHNVD 7.29.0▲Trending — 5 sources updated this weekExploited in the wild

7.2

Microsoft Exchange Server Remote Code Execution Vulnerability

CVSS v3: 7.2
EG Score: 9.0(high)
EPSS: 87.5%
KEV: ⚠ Exploited

Published

July 14, 2021

Last Modified

October 29, 2025

References (3)

secure@microsofthttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31196
af854a3a-2127-422b-91ae-364da2661108https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31196
134c704f-9b21-4f2e-91b3-4a467353bcc0https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31196

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-2021-311962021-07-13
Microsoft Exchange Server Remote Code Execution Vulnerability

Data Freshness Timeline

(refreshed 20× 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.

2026-06-10 04:10 UTCEG score recompute
2026-06-10 04:10 UTCVendor advisory
2026-06-10 04:10 UTCGHSA enrichment
2026-06-09 23:48 UTCEG score recompute
2026-06-09 23:48 UTCVendor advisory
2026-06-09 23:48 UTCGHSA enrichment
2026-06-09 19:26 UTCEG score recompute
2026-06-09 19:26 UTCVendor advisory
2026-06-09 19:26 UTCGHSA enrichment
2026-06-09 18:42 UTCCISA KEV update
2026-06-09 17:12 UTCCISA KEV update
2026-06-09 15:04 UTCEG score recompute
2026-06-09 15:04 UTCVendor advisory
2026-06-09 15:04 UTCGHSA enrichment
2026-06-09 10:42 UTCEG score recompute
2026-06-09 10:42 UTCVendor advisory
2026-06-09 10:42 UTCGHSA enrichment
2026-06-09 06:21 UTCEG score recompute
2026-06-09 06:21 UTCVendor advisory
2026-06-09 06:20 UTCGHSA enrichment

Frequently asked(6)

What is CVE-2021-31196?

CVE-2021-31196 is a high vulnerability published on July 14, 2021. Microsoft Exchange Server Remote Code Execution Vulnerability

When was CVE-2021-31196 disclosed?

CVE-2021-31196 was first published in the National Vulnerability Database on July 14, 2021, with the most recent update on October 29, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-31196 actively exploited?

Yes. CISA added CVE-2021-31196 to the Known Exploited Vulnerabilities catalog on August 21, 2024, affecting Microsoft Exchange Server. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.

What is the CVSS score of CVE-2021-31196?

CVE-2021-31196 has a CVSS v3 base score of 7.2 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.

Which products are affected by CVE-2021-31196?

CVE-2021-31196 affects Microsoft Exchange Server. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.

How do I remediate CVE-2021-31196?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-31196, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-31196

Explore →

Is Your Infrastructure Affected by CVE-2021-31196?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2021-31196

📅 Published

🔄 Last Modified

🔗 References (3)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(6)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-31196?

🔗 Related CVEs(same vendor)

Same vendor

Published

Last Modified

References (3)

Frequently asked(6)

Related CVEs(same vendor)