CVE-2021-22777

Code execution via malicious project-file deserialization

Published Jul 21, 2021 · Updated Aug 3, 2024

Deserialization of untrusted data in Schneider Electric SoSafe Configurable before 1.8.1 allows local users to execute code via a malicious project file. The project-file loading path deserializes attacker-controlled data without validating the resulting objects; the affected function and serialization format are undisclosed. Execution requires a user to open the crafted file, after which code runs in the application's security context on the workstation.

CVSS severity7.8
High
EPSS probability0.94%
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 Schneider Electric SoSafe Configurable before 1.8.1 allows local users to execute code via a malicious project file. The project-file loading path deserializes attacker-controlled data without validating the resulting objects; the affected function and serialization format are undisclosed. Execution requires a user to open the crafted file, after which code runs in the application's security context on the workstation.

The record

CVE
CVE-2021-22777
Published
Jul 21, 2021
Updated
Aug 3, 2024
Vendor
Schneider Electric
Product
SoSafe Configurable
Classifications
CWE-502, CAPEC-586, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 21, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=SoSafe Configurable prior to V1.8.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Schneider Electric · SoSafe Configurableversion=SoSafe Configurable prior to V1.8.1

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
CAPEC-586Object Injection
T1204.002User Execution: Malicious File

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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