CVE-2023-20853Network attack vector

Unauthenticated command execution via asynchronous MSMQ deserialization

Published Apr 27, 2023 · Updated Jan 30, 2025

Deserialization in a+HRD 6.8.1039V844 allows remote attackers to execute arbitrary system commands through asynchronous MSMQ messages. The asynchronous MSMQ message process reconstructs objects from untrusted message data without validating that data first. No authentication or user interaction is required, and successful exploitation permits arbitrary system operations or service disruption.

CVSS severity9.8
Critical
EPSS probability0.99%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization in a+HRD 6.8.1039V844 allows remote attackers to execute arbitrary system commands through asynchronous MSMQ messages. The asynchronous MSMQ message process reconstructs objects from untrusted message data without validating that data first. No authentication or user interaction is required, and successful exploitation permits arbitrary system operations or service disruption.

The record

CVE
CVE-2023-20853
Published
Apr 27, 2023
Updated
Jan 30, 2025
Vendor
aEnrich
Product
a+HRD
Classifications
CWE-502, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 27, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 30, 2025Record 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=6.8.1039V844

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

aEnrich · a+HRDversion=6.8.1039V844

Published CVSS scores

9.8TWCERT/CCCVSS:3.1/AV:N/AC:L/PR:N/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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