PT-2021-5266 · Microsoft · Exchange Server

Mr_Me + 1 · Published 2021-04-08 · Updated 2025-06-24 · CVE-2021-31206

Positive Technologies (AI Summary)

CVSS v2.0

7.9

High

Base vector

AV:A/AC:M/Au:N/C:C/I:C/A:C

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

Description The issue is related to errors in code generation management. It allows a remote attacker to execute arbitrary code. The vulnerability can be exploited by a remote attacker to affect the system. There is no information provided about the estimated number of potentially affected devices worldwide or 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.

Code Injection

Weakness Enumeration

CWE-94

Related Identifiers

BDU:2021-06092

CVE-2021-31206

ZDI-21-826

Affected Products

Exchange Server

References · 12

• https://bdu.fstec.ru/vul/2021-06092 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-826 · Security Note
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31206 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-31206 · Security Note
• https://osv.dev/vulnerability/CVE-2021-31206 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31206 · Vendor Advisory
• https://t.me/osintflow/33 · Telegram Post
• https://github.com/Loqueseamevaleverg/ProxyHell · Note
• https://cybersecurity-help.cz/vdb/SB2021071319 · Note
• https://twitter.com/ErichKron/status/1937509088143053166 · Twitter Post
• https://t.me/cibsecurity/26161 · Telegram Post
• https://t.me/cvenotify/21226 · Telegram Post