CVE-2026-55008

CVE Enrichment

CVSS: 9.6 CRITICAL
EPSS: 0.86%
EPSS Percentile: 58.41%
CISA KEV: Not listed

Description

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

Technical Details

CVSS Version: 3.1
CNA / NVD Source: [email protected]
Published: 15-Jul-2026 00:17
Last Modified: 25-Jul-2026 02:19
EPSS Date: 2026-10-27
CWE: CWE-79

CVSS Vector


            CVSS:3.1                            AV:N /
                            AC:L /
                            PR:N /
                            UI:R /
                            S:C /
                            C:H /
                            I:H /
                            A:H

Affected Products / Versions

microsoft / exchange_server Source: NVD CPE · affected
Version / affected range: 2016
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_23:*:*:*:*:*:*
microsoft / exchange_server Source: NVD CPE · affected
Version / affected range: 2019
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_14:*:*:*:*:*:*
microsoft / exchange_server Source: NVD CPE · affected
Version / affected range: 2019
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_15:*:*:*:*:*:*
microsoft / exchange_server_subscription_edition Source: NVD CPE · affected
Version / affected range: * · before (exclusive) 15.02.2562.045
cpe:2.3:a:microsoft:exchange_server_subscription_edition:*:*:*:*:*:*:*:*

References

[email protected]

Last enrichment sync: 28-Oct-2026 20:46
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

An XSS in Exchange Server (CVE-2026-55008) and remote code execution (RCE) bugs in the Remote Desktop Protocol (CVE-2026-56190), Windows DHCP Server (CVE-2026-50518), Windows Server Network driver (CVE-2026-56188), and Microsoft Patches 622 Vulnerabilities, Including Two Exploited Zero-Days

CVE (9)

People (2)

Vendors (1)

Products (11)

Tools (1)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.