PT-2021-4434 · Microsoft · Exchange Server

Andrew Ruddick · Published 2021-10-12 · Updated 2023-08-01 · CVE-2021-26427

Positive Technologies (AI Summary)

CVSS v3.1

9.0

Critical

Base vector

AV:A/AC:L/PR:L/UI:N/S:C/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 errors in object handling in memory. It allows a remote attacker to execute arbitrary code.

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

Code Injection

Weakness Enumeration

CWE-94

Related Identifiers

BDU:2021-05064

CVE-2021-26427

Affected Products

Exchange Server

References · 9

• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26427 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26427 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-26427 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-26427 · Security Note
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26427 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-05064 · Security Note
• https://t.me/true_secator/2209 · Telegram Post
• https://t.me/avleonovcom/922 · Telegram Post
• https://t.me/isacarusec/4535 · Telegram Post