CVE-2023-21707

Microsoft Exchange Server Remote Code Execution Vulnerability

Microsoft Exchange Server Remote Code Execution Vulnerability

CVSS 3.1 · 8.8 High EPSS 79.6% KEV · Not listed

Vendors

Microsoft

Products

Exchange Server

CVE-2026-62914

Microsoft Exchange Server Spoofing Vulnerability

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.

CVSS 3.1 · 7.3 High EPSS < 1% KEV · Not listed

Vendors

Microsoft

Products

Exchange Server Exchange Server 2016 Exchange Server 2019 and 5 more

CVE-2026-62913

Microsoft Exchange Server Remote Code Execution Vulnerability

Heap-based buffer overflow in Microsoft Exchange Server allows an authorized attacker to execute code over a network.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

Vendors

Microsoft

Products

Exchange Server Exchange Server 2016 Exchange Server 2019 and 6 more

CVE-2026-62910

Microsoft Exchange Server Elevation of Privilege Vulnerability

Improper control of resource identifiers ('resource injection') in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

CVSS 3.1 · 7.2 High EPSS 1.0% KEV · Not listed

Vendors

Microsoft

Products

Exchange Server Exchange Server 2016 Exchange Server 2019 and 6 more

CVE-2026-62915

Microsoft Exchange Server Security Feature Bypass Vulnerability

Missing authorization in Microsoft Exchange Server allows an authorized attacker to bypass a security feature over a network.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Microsoft

Products

Exchange Server Exchange Server 2016 Exchange Server 2019 and 6 more

CVE-2026-62912

Microsoft Exchange Server Denial of Service Vulnerability

Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to deny service over a network.

CVSS 3.1 · 6.5 Medium EPSS 2.0% KEV · Not listed

Vendors

Microsoft

Products

Exchange Server Exchange Server 2016 Exchange Server 2019 and 3 more

CVE-2021-34470

Microsoft Exchange Server Elevation of Privilege Vulnerability

Microsoft Exchange Server Elevation of Privilege Vulnerability

CVSS 3.1 · 8 High EPSS 4.4% KEV · Not listed

Vendors

Microsoft

Products

Exchange Server

CVE-2023-38181

Microsoft Exchange Server Spoofing Vulnerability

Microsoft Exchange Server Spoofing Vulnerability

CVSS 3.1 · 8.8 High EPSS 10.8% KEV · Not listed

Vendors

Microsoft

Products

Exchange Server Exchange Server 2016

CVE-2023-38182

Microsoft Exchange Server Remote Code Execution Vulnerability

Microsoft Exchange Server Remote Code Execution Vulnerability

CVSS 3.1 · 8 High EPSS 5.9% KEV · Not listed

Vendors

Microsoft

Products

Exchange Server Exchange Server 2016

CVE-2023-35388

Microsoft Exchange Server Remote Code Execution Vulnerability

Microsoft Exchange Server Remote Code Execution Vulnerability

CVSS 3.1 · 8 High EPSS 6.8% KEV · Not listed

Vendors

Microsoft

Products

Exchange Server Exchange Server 2016

CVE-2023-38185

Microsoft Exchange Server Remote Code Execution Vulnerability

Microsoft Exchange Server Remote Code Execution Vulnerability

CVSS 3.1 · 8.8 High EPSS 2.7% KEV · Not listed

Vendors

Microsoft

Products

Exchange Server Exchange Server 2016

CVE-2021-33768

Microsoft Exchange Server Elevation of Privilege Vulnerability

Microsoft Exchange Server Elevation of Privilege Vulnerability

CVSS 3.1 · 8 High EPSS 1.1% KEV · Not listed

Vendors

Microsoft

Products

Exchange Server

CVE-2021-33766

Microsoft Exchange Server Information Disclosure Vulnerability

Microsoft Exchange Server Information Disclosure Vulnerability

CVSS 3.1 · 7.3 High EPSS 98.2% KEV · Listed

Vendors

Microsoft

Products

Exchange Server

CVE-2021-31206

Microsoft Exchange Server Remote Code Execution Vulnerability

Microsoft Exchange Server Remote Code Execution Vulnerability

CVSS 3.1 · 7.6 High EPSS 13.0% KEV · Not listed

Vendors

Microsoft

Products

Exchange Server

CVE-2021-34473

Microsoft Exchange Server Remote Code Execution Vulnerability

Microsoft Exchange Server Remote Code Execution Vulnerability

CVSS 3.1 · 9.1 Critical EPSS 100.0% KEV · Listed

Vendors

Microsoft

Products

Exchange Server

CVE-2021-34523

Microsoft Exchange Server Elevation of Privilege Vulnerability

Microsoft Exchange Server Elevation of Privilege Vulnerability

CVSS 3.1 · 9 Critical EPSS 100.0% KEV · Listed

Vendors

Microsoft

Products

Exchange Server

CVE-2023-35368

Microsoft Exchange Remote Code Execution Vulnerability

Microsoft Exchange Remote Code Execution Vulnerability

CVSS 3.1 · 8.8 High EPSS 2.5% KEV · Not listed

Vendors

Microsoft

Products

Exchange Server Exchange Server 2016

CVE-2023-21709

Microsoft Exchange Server Elevation of Privilege Vulnerability

Microsoft Exchange Server Elevation of Privilege Vulnerability

CVSS 3.1 · 9.8 Critical EPSS 2.0% KEV · Not listed

Vendors

Microsoft

Products

Exchange Server Exchange Server 2016

CVE-2021-31196

Microsoft Exchange Server Remote Code Execution Vulnerability

Microsoft Exchange Server Remote Code Execution Vulnerability

CVSS 3.1 · 7.2 High EPSS 54.1% KEV · Listed

Vendors

Microsoft

Products

Exchange Server

CVE-2026-56191

Microsoft Exchange Online Tampering Vulnerability

Improper authentication in Microsoft Exchange Online allows an unauthorized attacker to perform tampering over a network.

CVSS 3.1 · 10 Critical EPSS < 1% KEV · Not listed

Vendors

Microsoft

Products

Exchange Online