CVE-2023-21703Network attack vector

Authenticated remote code execution via unsafe deserialization

Published Feb 14, 2023 · Updated Aug 19, 2026

Unsafe deserialization in Microsoft Azure Data Box Gateway and Azure Stack Edge allows remote authenticated users to execute code. Microsoft identifies deserialization of untrusted data but has not disclosed the affected component, serialized format, or unsafe operation. Administrative privileges are required over a network-reachable interface, and successful exploitation can expose or modify appliance data without a reported service interruption.

CVSS severity6.5
Medium
EPSS probability1.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe deserialization in Microsoft Azure Data Box Gateway and Azure Stack Edge allows remote authenticated users to execute code. Microsoft identifies deserialization of untrusted data but has not disclosed the affected component, serialized format, or unsafe operation. Administrative privileges are required over a network-reachable interface, and successful exploitation can expose or modify appliance data without a reported service interruption.

The record

CVE
CVE-2023-21703
Published
Feb 14, 2023
Updated
Aug 19, 2026
Vendor
Microsoft
Product
Azure Stack Edge
Classifications
CWE-502
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Feb 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.2.0 <1.6.2225.773

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Microsoft · Azure Stack Edgeversion=2.2.0 <1.6.2225.773
Microsoft · Azure Data Box Gatewayversion=1.6.0 <1.6.2225.773

Published CVSS scores

6.5Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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