PT-2023-1453 · Microsoft · Exchange Server

Chudypb + 2 · Published 2023-02-14 · Updated 2026-04-29 · CVE-2023-21529

Positive Technologies (AI Summary)

CVSS v2.0

9.0

High

Base vector

AV:N/AC:L/Au:S/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 the use of dangerous methods or functions in Microsoft Exchange Server, allowing a remote attacker to execute arbitrary code. This can enable the attacker to impact the system. The vulnerability involves the abuse of the allowed MultiValuedProperty class for remote code execution.

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

Exploit

LPE

DoS

RCE

Deserialization of Untrusted Data

Weakness Enumeration

CWE-749

CWE-502

Related Identifiers

BDU:2023-00860

CVE-2023-21529

ZDI-23-162

Affected Products

Exchange Server

References · 28

• 🔥❌ https://github.com/tr1pl3ight/CVE-2023-21529-POC · Exploit, Deleted
• https://microsoft.com/en-us/security/blog/2026/04/06/storm-1175-focuses-gaze-on-vulnerable-web-facing-assets-in-high-tempo-medusa-ransomware-operations · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-00860 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-21529 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21529 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-21529 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-21529 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/690099 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-23-162 · Security Note
• https://t.me/avleonovcom/1081 · Telegram Post
• https://twitter.com/inferlume_hq/status/2048791648025612339 · Twitter Post
• https://twitter.com/JulianWieg/status/1691178000635613184 · Twitter Post
• https://twitter.com/grok/status/1959694849608913388 · Twitter Post
• https://cisa.gov/sites/default/files/csv/known_exploited_vulnerabilities.csv · Note
• https://twitter.com/inferlume_hq/status/2048791645970371004 · Twitter Post