CVE-2021-22855Network attack vector

Unauthenticated command execution via unrestricted object deserialization

Published Feb 17, 2021 · Updated Sep 16, 2024

Deserialization of untrusted data in Soar Cloud HR Portal 7.3.2020.1013 allows remote attackers to execute arbitrary commands. An unspecified HR Portal function accepts attacker-supplied serialized objects of any type and deserializes them without restricting permitted classes. No authentication or user interaction is required, and command execution can compromise the portal host's data and availability.

CVSS severity9.8
Critical
EPSS probability2.04%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization of untrusted data in Soar Cloud HR Portal 7.3.2020.1013 allows remote attackers to execute arbitrary commands. An unspecified HR Portal function accepts attacker-supplied serialized objects of any type and deserializes them without restricting permitted classes. No authentication or user interaction is required, and command execution can compromise the portal host's data and availability.

The record

CVE
CVE-2021-22855
Published
Feb 17, 2021
Updated
Sep 16, 2024
Vendor
Soar Cloud System CO., LTD.
Product
HR Portal
Classifications
CWE-502, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 17, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record 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=0 7.3.2020.1013

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Soar Cloud System CO., LTD. · HR Portalversion=0 7.3.2020.1013

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8TWCERT/CCCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS: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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

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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