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CVE-2019-18988: TeamViewer Desktop Bypass Remote Login Vulnerability

criticalknown exploitedpublic exploitCVE-2019-18988
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
TeamViewer Desktop allows for bypass of remote-login access control because the same AES key is used for different customers' installations. If an attacker were to know this key, they could decrypt protected information stored in registry or configuration files or decryption of the Unattended Access password to the system (which allows for remote login to the system).

CSIRTS triage

vendor: TeamViewerproduct: DesktopAuthentication bypass
What
The vulnerability allows bypass of remote-login access control due to shared AES keys across installations.
Who is affected
Users of TeamViewer Desktop are affected.
Urgency
Remediation is critical as the vulnerability is actively exploited and poses significant risks.
Action
Update to the latest version of TeamViewer.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2021-11-03
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2019-18988

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2019-18988coverage & exploitation statusNVD · CVE.org

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