PT-2021-3790 · Microsoft · Exchange Server

James Forshaw · Published 2021-07-13 · Updated 2026-02-22 · CVE-2021-34470

Positive Technologies (AI Summary)

CVSS v3.1

8.0

High

Base vector

AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Microsoft Exchange Server (affected versions not specified)

Description The issue is related to insecure privilege management in Microsoft Exchange Server, allowing a remote attacker to elevate their privileges. There is no information provided about the estimated number of potentially affected devices worldwide or details about real-world incidents where this issue was exploited.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Privilege Management

Weakness Enumeration

CWE-269

Related Identifiers

BDU:2021-04065

CVE-2021-34470

Affected Products

Exchange Server

References · 9

• https://bdu.fstec.ru/vul/2021-04065 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-34470 · Security Note
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34470 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-34470 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-34470 · Vendor Advisory
• http://packetstormsecurity.com/files/163706/Microsoft-Exchange-AD-Schema-Misconfiguration-Privilege-Escalation.html · Note
• https://t.me/cybersecuritytechnologies/3950 · Telegram Post
• https://t.me/cibsecurity/26163 · Telegram Post
• https://t.me/cvenotify/21225 · Telegram Post