HIGH
CVE-2021-34803
CWE-427Published: June 16, 2021· Updated: Jun 17, 2026
7.8
CVSS v3.1
Official Description
TeamViewer before 14.7.48644 on Windows loads untrusted DLLs in certain situations.
Technical Analysis
CVE-2021-34803 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
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
All References (14)
→
https://community.teamviewer.com/English/discussion/111147/windows-v9-0-259145Release Notes · Vendor Advisory
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https://community.teamviewer.com/English/discussion/111149/windows-v10-0-259144Release Notes · Vendor Advisory
→
https://community.teamviewer.com/English/discussion/111150/windows-v11-0-259143Release Notes · Vendor Advisory
→
https://community.teamviewer.com/English/discussion/111151/windows-v12-0-259142Release Notes · Vendor Advisory
→
https://community.teamviewer.com/English/discussion/111152/windows-v13-2-36222Release Notes · Vendor Advisory
→
https://community.teamviewer.com/English/discussion/111153/windows-v14-2-56678Release Notes · Vendor Advisory
→
https://community.teamviewer.com/English/discussion/111154/windows-v14-7-48644Release Notes · Vendor Advisory
→
https://community.teamviewer.com/English/discussion/111147/windows-v9-0-259145Release Notes · Vendor Advisory
→
https://community.teamviewer.com/English/discussion/111149/windows-v10-0-259144Release Notes · Vendor Advisory
→
https://community.teamviewer.com/English/discussion/111150/windows-v11-0-259143Release Notes · Vendor Advisory
→
https://community.teamviewer.com/English/discussion/111151/windows-v12-0-259142Release Notes · Vendor Advisory
→
https://community.teamviewer.com/English/discussion/111152/windows-v13-2-36222Release Notes · Vendor Advisory
→
https://community.teamviewer.com/English/discussion/111153/windows-v14-2-56678Release Notes · Vendor Advisory
→
https://community.teamviewer.com/English/discussion/111154/windows-v14-7-48644Release Notes · Vendor Advisory
Quick Facts
CVE IDCVE-2021-34803
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-427
CISA KEVNo
Affected2 vendor(s)
PublishedJun 16, 2021
Related CVEs (CWE-427)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-34803 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.