Security readout for executives and security teams
Plain-English summary
TeamViewer Desktop used a shared encryption key across customer installations. If an attacker can obtain stored TeamViewer registry or configuration data, they may decrypt protected settings and, in older versions, unattended access passwords used for remote login.
Executive priority
Treat this as a high-priority remote access risk because CISA lists it as known exploited. Prioritize discovery, credential rotation, and vendor-guided remediation on systems using unattended access or legacy TeamViewer versions.
Technical view
CVE-2019-18988 affects TeamViewer Desktop through 14.7.1965. The CVE describes shared AES-key use for OptionsPasswordAES since at least v7.0.43148. Pre-9.x versions could expose unattended access passwords. CVSS is 7.0 with local, privileged preconditions.
Likely exposure
Highest concern is endpoints running TeamViewer Desktop through 14.7.1965, especially pre-9.x installations, with unattended access enabled or exported registry/configuration files stored in shared or online locations.
Exploitation context
CISA KEV lists this CVE, so known exploitation is supported. Sources indicate attackers usually need existing system access, unless TeamViewer configuration or registry data is available off-machine.
Researcher notes
The provided CVE data has incomplete affected-product metadata, but the title and description identify TeamViewer Desktop through 14.7.1965. Do not assume a specific patch version beyond vendor guidance from the cited sources.
Mitigation direction
- Inventory TeamViewer Desktop versions and prioritize systems through 14.7.1965.
- Upgrade or remediate according to current TeamViewer security guidance.
- Rotate unattended access credentials and TeamViewer-protected settings where exposure is possible.
- Remove exported TeamViewer registry or configuration data from shared or online storage.
- Disable unattended access where it is not operationally required.
- Restrict and monitor TeamViewer usage on managed endpoints.
Validation and detection
- Confirm whether TeamViewer Desktop is installed and identify exact versions.
- Check for pre-9.x deployments and unattended access configuration.
- Look for exported TeamViewer registry or configuration files outside endpoints.
- Review remote access logs for unexpected TeamViewer connections.
- Verify credential rotation after remediation.
- Confirm vendor guidance was reviewed for the deployed version.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-521: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2019-18988 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
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.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H15.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7HighVector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://community.teamviewer.com/t5/Knowledge-Base/tkb-p/Knowledgebase?threadtype=label&labels=SecurityCVE reference · x_refsource_MISC
- https://whynotsecurity.com/blog/teamviewer/CVE reference · x_refsource_MISC
- https://twitter.com/Blurbdust/status/1224212682594770946?s=20CVE reference · x_refsource_MISC
- https://community.teamviewer.com/t5/Announcements/Specification-on-CVE-2019-18988/td-p/82264CVE reference · x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-18988CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Weak Password Requirements
Weak Password Requirements represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.