HOMEVULNERABILITIESCVE-2021-27496
HIGH

CVE-2021-27496

CWE-822Published: May 27, 2021· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

Datakit Software libraries CatiaV5_3dRead, CatiaV6_3dRead, Step3dRead, Ug3dReadPsr, Jt3dReadPsr modules in KeyShot Versions v10.1 and prior lack proper validation of user-supplied data when parsing PRT files. This could lead to pointer dereferences of a value obtained from an untrusted source. An attacker could leverage this vulnerability to execute code in the context of the current process.

NVD Source

Technical Analysis

CVE-2021-27496 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Vendors & Products

datakit1 product(s)
crosscadware
luxion1 product(s)
keyshot
siemens4 product(s)
solid edge se2020 firmwaresolid edge se2020solid edge se2021 firmwaresolid edge se2021
Source: NVD CPE · 6 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://cert-portal.siemens.com/productcert/pdf/ssa-119468.pdf
ADVISORYhttps://us-cert.cisa.gov/ics/advisories/icsa-21-145-01
ADVISORYhttps://www.zerodayinitiative.com/advisories/ZDI-21-565/
ADVISORYhttps://cert-portal.siemens.com/productcert/pdf/ssa-119468.pdf
ADVISORYhttps://us-cert.cisa.gov/ics/advisories/icsa-21-145-01
ADVISORYhttps://www.zerodayinitiative.com/advisories/ZDI-21-565/

All References (6)

→
https://cert-portal.siemens.com/productcert/pdf/ssa-119468.pdfThird Party Advisory
→
https://us-cert.cisa.gov/ics/advisories/icsa-21-145-01Third Party Advisory · US Government Resource
→
https://www.zerodayinitiative.com/advisories/ZDI-21-565/Third Party Advisory · VDB Entry
→
https://cert-portal.siemens.com/productcert/pdf/ssa-119468.pdfThird Party Advisory
→
https://us-cert.cisa.gov/ics/advisories/icsa-21-145-01Third Party Advisory · US Government Resource
→
https://www.zerodayinitiative.com/advisories/ZDI-21-565/Third Party Advisory · VDB Entry

Quick Facts

CVE IDCVE-2021-27496
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-822
CISA KEVNo
Affected3 vendor(s)
PublishedMay 27, 2021

Related CVEs (CWE-822)

CVE-2026-48137
9.8
CVE-2025-50165
9.8
CVE-2018-7497
9.8
CVE-2023-43518
9.8
CVE-2018-12548
9.8
CVE-2023-1437
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-27496 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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