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No exploitation reportedFix available

CVE-2021-25665

No exploitation reported by the sources we read.

  • Published2021-09-14
  • Fixed in2021.2.1
  • WeaknessCWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A vulnerability has been identified in Simcenter STAR-CCM+ Viewer (All versions < V2021.2.1). The starview+.exe application lacks proper validation of user-supplied data when parsing scene files. This could result in an out of bounds write past the end of an allocated structure. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-13700)

Timeline

dates in UTC
  1. 2021-09-1411:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-25665?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-25665?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Siemens simcenter star-ccm\+
BranchAffectedFixed in
2021.2< 2021.2.12021.2.1

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • ICSA-21-257-05 CISA1 known affected

    Siemens Simcenter STAR-CCM+ Viewer

    Simcenter STAR-CCM+ Viewer

Full record on NVD

Fix

  1. Update Siemens simcenter star-ccm\+ to 2021.2.1
  2. Vendor fix CISA ICSA-21-257-05 · 1 productUpdate to V2021.2.1 or later version
  3. Mitigation from the vendor CISA ICSA-21-257-05 · 1 productDo not open untrusted scene files from unknown sources

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVSS 3.17.8read 2026-10-23
  • NVDCVSS 2.06.8read 2026-10-23
  • CNAweakness (CWE)CWE-787read 2026-10-23
  • FIRST EPSSEPSS score1.3 %2026-10-22

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2021-09-14
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2021-25665?

A vulnerability has been identified in Simcenter STAR-CCM+ Viewer (All versions < V2021.2.1). The starview+.exe application lacks proper validation of user-supplied data when parsing scene files. This could result in an out of bounds write past the end of an allocated structure. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-13700)

Is CVE-2021-25665 actively exploited?

Active exploitation of CVE-2021-25665 has not been confirmed. Its EPSS score was 1.3% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-25665?

CVE-2021-25665 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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