CVE-2021-22758

Code execution via uninitialized CGF pointer

Published Jun 11, 2021 · Updated Aug 3, 2024

Uninitialized-pointer access in IGSS Definition 15.0.0.21140 and earlier allows attackers to execute code through a malicious CGF import. The Def.exe CGF importer fails to validate user-supplied file data before accessing an uninitialized pointer. Exploitation requires a user to import the crafted file and can execute code in the application context or cause data loss.

CVSS severity7.8
High
EPSS probability1.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uninitialized-pointer access in IGSS Definition 15.0.0.21140 and earlier allows attackers to execute code through a malicious CGF import. The Def.exe CGF importer fails to validate user-supplied file data before accessing an uninitialized pointer. Exploitation requires a user to import the crafted file and can execute code in the application context or cause data loss.

The record

CVE
CVE-2021-22758
Published
Jun 11, 2021
Updated
Aug 3, 2024
Vendor
Distributed Data Systems
Product
IGSS (Interactive Graphical SCADA System)
Classifications
CWE-824, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 11, 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?

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  1. Affected versionversion=IGSS Definition (Def.exe) V15.0.0.21140 and prior

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Distributed Data Systems · IGSS (Interactive Graphical SCADA System)version=IGSS Definition (Def.exe) V15.0.0.21140 and prior

Published CVSS scores

6.8NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
7.8NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/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 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-824Access of Uninitialized Pointer
T1204.002Malicious File

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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