Is CVE-2021-34803 in the CISA KEV catalog?

No. CVE-2021-34803 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-34803?

CVE-2021-34803 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2021-34803?

CVE-2021-34803 has an EPSS score of 0.47% (37th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-34803?

Upgrade TeamViewer to 9.0.259145 or later.

CVE & CISA-KEV Catalog

CVE-2021-34803

HIGH

7.8

CVSS v3

NVD

Description

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

CWE-427

How to fix

Remediation Available

TeamViewerWindows application

Affected:9.0.259145Fixed in:9.0.259145TeamViewer

Affected:11.0.90968 11.0.259143Fixed in:11.0.259143TeamViewer

Affected:13.0.5058 13.2.36222Fixed in:13.2.36222TeamViewer

Affected:12.0.92876 12.0.259142Fixed in:12.0.259142TeamViewer

Affected:14.3.4730 14.7.48644Fixed in:14.7.48644TeamViewer

Affected:10.0.2551 10.0.259144Fixed in:10.0.259144TeamViewer

Affected:14.0.8346 14.2.56678Fixed in:14.2.56678TeamViewer

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

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

Exploit Intelligence

0.47%probability of exploitation in 30 days

37thpercentile

Low risk: more likely to be exploited than 37% of all known CVEs.

References

Vendor Advisory7

Related Vulnerabilities

Other CWE-427 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-27955	Critical	9.8	83%	-	-
CVE-2017-6517	Critical	9.8	46%	-	-
CVE-2020-3153	Medium	6.5	28%	KEV + Ransom	Fix
CVE-2024-48990	High	7.8	20%	-	Fix
CVE-2019-9491	High	7.8	13%	-	-
CVE-2020-3433	High	7.8	10%	KEV + Ransom	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.