CVE-2019-18988 on CISA KEV

TeamViewer Desktop through 14.7.1965 allows a bypass of remote-login access control because the same key is used for different customers' installations. It used a shared AES key for all installations since at least as far back as v7.0.43148, and used it for at least OptionsP

01What CISA says about this vulnerability

TeamViewer Desktop through 14.7.1965 allows a bypass of remote-login access control because the same key is used for different customers' installations. It used a shared AES key for all installations since at least as far back as v7.0.43148, and used it for at least OptionsPasswordAES in the current version of the product. If an attacker were to know this key, they could decrypt protect…

02Required action — verbatim from CISA

Apply updates per vendor instructions.

03Notes & references

• community.teamviewer.com — https://community.teamviewer.com/t5/Knowledge-Base/tkb-p/Knowledgebase?threadtyp…
• whynotsecurity.com — https://whynotsecurity.com/blog/teamviewer/
• twitter.com — https://twitter.com/Blurbdust/status/1224212682594770946?s=20
• community.teamviewer.com — https://community.teamviewer.com/t5/Announcements/Specification-on-CVE-2019-1898…

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

Vendor	Product	Versions
n	a / n/a	n/a

06Detection

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