LiveActive security incident?Get immediate response
CVE Record

CVE-2021-32944: A use-after-free issue exists in the DGN file-reading procedure in the Drawings SDK (All versions prior to...

A use-after-free issue exists in the DGN file-reading procedure in the Drawings SDK (All versions prior to 2022.4) resulting from the lack of proper validation of user-supplied data. This can result in a memory corruption or arbitrary code execution, allowing attackers to cause a denial-of-service condition or execute code in the context of the current process.

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This flaw affects Drawings SDK versions before 2022.4 when reading DGN drawing files. A malicious or malformed file can corrupt memory, potentially crashing the application or running code with the same permissions as the process that opens it.

Executive priority

Treat this as a high-priority exposure review if the organization processes DGN files in engineering, industrial, or design workflows. Prioritize inventory and vendor-version confirmation before emergency response, because the provided sources do not show active exploitation.

Technical view

CVE-2021-32944 is a CWE-416 use-after-free in the DGN file-reading procedure of Drawings SDK before 2022.4. The issue stems from insufficient validation of user-supplied data and can cause memory corruption, denial of service, or arbitrary code execution in the current process context.

Likely exposure

Exposure is most likely where Drawings SDK before 2022.4 is used directly, or where software includes that vulnerable SDK and processes DGN files. The source bundle does not provide a complete downstream product inventory.

Exploitation context

The bundle does not state active exploitation, and KEV is false. The realistic risk path is opening or importing an untrusted DGN file in software using the vulnerable SDK, with impact limited to the current process context described by the CVE.

Researcher notes

The evidence identifies the vulnerable component, affected version range, weakness class, and impact. CVSS details are absent in the supplied bundle, and downstream affected products are not enumerated here; use the referenced advisories for product-specific mapping.

Mitigation direction

  • Upgrade Drawings SDK to version 2022.4 or later where applicable.
  • Check Siemens and vendor advisories for affected downstream products and fixed versions.
  • Restrict handling of untrusted DGN files until affected software is updated.
  • Run file-opening workflows with least-privilege user accounts where possible.

Validation and detection

  • Inventory applications that use Drawings SDK or process DGN files.
  • Confirm SDK versions are 2022.4 or later.
  • Review Siemens advisories for product-specific exposure and remediation status.
  • Verify controls limiting untrusted DGN file intake are in place.
Prepared
Confidence
medium
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-416: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2021-32944 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
6Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/aDrawings SDKAll versions prior to 2022.4Listed
Weakness

CWE details

CWE-416

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-416 · source CWE mapping

Use After Free

Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs