Skip to content
Fencer Vulns
high 7.8

CVE-2021-34803 json

TeamViewer before 14.7.48644 on Windows loads untrusted DLLs in certain situations.

published 2021-06-16 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-21450

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 40%
public exploits
0
none known

Summary

TeamViewer before 14.7.48644 on Windows loads untrusted DLLs in certain situations.

Patch / fix

  • teamviewer teamviewer 9.0.259145, 10.0.259144, 11.0.259143, 12.0.259142, 13.2.36222, 14.2.56678, 14.7.48644

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-21-308-01 updated cvss 5.3

VISAM VBASE Editor

  • VISAM VBASE Pro-RT/ Server-RT (Web Remote) 11.6.0.6
    affected: mitigation “VISAM recommends users update to VBASE v11.7.0.2 or later. Users may obtain a download link by submitting a request form.” vbase.net

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

0.47% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 4.4 AV:L/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-427 Uncontrolled Search Path Element

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.