CVE-2021-34330
No exploitation reported by the sources we read.
- Published2021-07-13
- Fixed in13.2.0
- WeaknessCWE-20 · CWE-416
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « 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 JT2Go (All versions < V13.2), Teamcenter Visualization (All versions < V13.2). The Jt981.dll library in affected applications lacks proper validation of user-supplied data prior to performing further free operations on an object when parsing JT files. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-13430)
Timeline
dates in UTC- 2021-07-1311:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-34330?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-34330?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 13.2 | < 13.2.0 | 13.2.0 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 13.2 | < 13.2.0 | 13.2.0 | NVD |
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-21-194-15_Siemens JT2Go and Teamcenter Visualization
Teamcenter Visualization: All versions prior to v13.2 · JT2Go: All versions prior to v13.2
Fix
- Update Siemens jt2go to 13.2.0
- Mitigation from the vendor CISA ICSA-21-194-15 · 2 productsAs a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens Operational Guidelines for Industrial Secur…
- Mitigation from the vendor CISA ICSA-21-194-15 · 2 productsJT2Go: Update to v13.2
- Mitigation from the vendor CISA ICSA-21-194-15 · 2 productsTeamcenter Visualization: Update to v13.2 (login required)
Advisories and patches
- cert-portal.siemens.comVendor Advisory
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-416read 2026-10-23
- NVDweakness (CWE)CWE-20read 2026-10-23
- FIRST EPSSEPSS score1.9 %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
- 2021-07-13
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2021-34330?
Is CVE-2021-34330 actively exploited?
What is the CVSS score for CVE-2021-34330?
Running JT2Go (All versions < V13.2)? Hear about its next vulnerability
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.