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CVE Record

CVE-2021-34803: TeamViewer before 14.7.48644 on Windows loads untrusted DLLs in certain situations.

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

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This CVE describes a TeamViewer for Windows issue where versions before 14.7.48644 can load untrusted DLL files in some situations. In business terms, the concern is unauthorized code running through a trusted remote-access tool. The public bundle does not provide CVSS scoring, exploitation evidence, or detailed attack conditions.

Executive priority

Prioritize as an exposure-reduction item for remote-access infrastructure, especially privileged endpoints. Urgency is constrained by incomplete public severity and exploitation data, but stale remote-access software should not remain unmanaged.

Technical view

CVE-2021-34803 is documented as untrusted DLL loading in TeamViewer before 14.7.48644 on Windows. The bundle provides no CWE, CVSS vector, affected CPEs, or proof-of-concept details. Assessment should focus on identifying old Windows TeamViewer installations and confirming vendor-fixed versions across maintained branches.

Likely exposure

Exposure is limited to Windows systems running TeamViewer versions before 14.7.48644, based on the CVE description. The bundle does not identify macOS, Linux, or other TeamViewer products as affected.

Exploitation context

The source bundle does not indicate active exploitation, KEV listing, public exploit availability, or required attacker position. Treat exploitation status as unconfirmed. DLL loading issues often depend on local file placement or path conditions, but those conditions are not specified here.

Researcher notes

The public record is sparse: no CVSS, CWE, exploit status, or detailed vulnerable path is included. Do not infer more affected products than TeamViewer on Windows before 14.7.48644. Validate against vendor release notes for each deployed major branch.

Mitigation direction

  • Inventory TeamViewer versions on Windows endpoints.
  • Upgrade affected installations using TeamViewer vendor guidance.
  • Prioritize systems where TeamViewer has privileged or unattended access.
  • Remove unused or unsupported TeamViewer installations.
  • Monitor vendor release notes for affected branch-specific fixes.

Validation and detection

  • Confirm installed TeamViewer versions are 14.7.48644 or later.
  • Check for older TeamViewer branches referenced by vendor release posts.
  • Verify software inventory covers laptops, servers, and remote-access jump hosts.
  • Review endpoint telemetry for unexpected DLL loads by TeamViewer.
  • Document any systems awaiting vendor-supported remediation.
Prepared
Confidence
medium
Sources
9

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

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CVE-2021-34803 mapping review

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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
8Source 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/an/an/aListed
Weakness

CWE details

No CWE listed

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