CYBERSECURITYTRACKER
Vulnerabilities

CVE-2023-21529

Microsoft Exchange Server: Deserialization of Untrusted Data

What it is

Reported

Microsoft Exchange Server contains a deserialization of untrusted data that allows an authenticated attacker to achieve remote code execution.

Source reported · Source: NVD · Complete source description.
Dates
Source last published: · Source last updated:

What is affected

Reported

Microsoft; Exchange Server. Product-level identification only; no affected-version conclusion is available from this field.

Source reported · Source: NVD
Dates
Source last published: · Source last updated:

Urgency and basis

Tracker computed

Act now

Current priority score and EPSS: loading from the tracker record. They are read when this page loads and are not shown without JavaScript. They change daily and are not part of "Source last updated".

Tracker decision tier from the evidence detailed below
Dates
Source last updated:

Exploitation evidence

Reported

Active exploitation · CISA KEV · VulnCheck KEV · ENISA exploited-vulnerability catalog

Source reported
Dates
Active since: · CISA KEV added: · VulnCheck KEV added: · ENISA added: · Source last updated:

What to do

Reported

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Source remediation ↗
Source reported · Tracked source remediation field
Dates
Source last updated:

Detection and validation

Mapped metadata availability only. These signals do not change priority.

Sigma, Atomic, Nuclei, and Metasploit: none mapped by tracked sources.

  • Sigma

    Not mapped by tracked sources.

  • Atomic

    Not mapped by tracked sources.

  • Nuclei

    Not mapped by tracked sources.

  • Metasploit

    Not mapped by tracked sources.

Evidence detail

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Glossary

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