Security readout for executives and security teams
Plain-English summary
CVE-2020-37132 is a local denial-of-service issue in UltraVNC Launcher 1.2.4.0. A person with access to the application interface can cause the launcher to crash through the password configuration field. This affects availability of the launcher, not confidentiality or data integrity based on the provided sources.
Executive priority
Treat as a moderate operational-risk issue. Prioritize remediation where UltraVNC Launcher supports helpdesk, remote support, or critical operational workflows. It is less urgent than remotely exploitable vulnerabilities, but public exploit details and easy local triggering justify timely inventory and cleanup.
Technical view
The issue is reported as CWE-121 in UltraVNC Launcher 1.2.4.0 password configuration properties. CVSS 4.0 score is 6.7 with local attack vector, low complexity, no privileges required, user interaction required, and high vulnerable-system availability impact. Sources describe application crash behavior, not remote code execution.
Likely exposure
Exposure is limited to systems running UltraVNC Launcher 1.2.4.0 where local users can access configuration properties. Internet-facing exposure is not indicated by the sources. Organizations using UltraVNC products should verify whether the Launcher component and exact version are present.
Exploitation context
Public exploit information exists on Exploit-DB, but the bundle does not indicate active exploitation, and KEV status is false. The described attack requires local access and interaction with the application UI. Business impact is mainly disruption of launcher functionality on affected endpoints.
Researcher notes
Evidence is narrow: affected product and version are UltraVNC Launcher 1.2.4.0 only. The sources describe denial of service via the password field and classify it as CWE-121. No source in the bundle confirms a patch, broader affected versions, remote exploitability, or active exploitation.
Mitigation direction
- Inventory endpoints for UltraVNC Launcher 1.2.4.0.
- Check UltraVNC and trusted advisories for fixed versions or vendor guidance.
- Upgrade or remove the affected Launcher version if a safe replacement is available.
- Restrict local access to systems where the launcher is installed.
- Limit use of the vulnerable configuration interface to trusted administrators.
Validation and detection
- Confirm whether UltraVNC Launcher 1.2.4.0 is installed.
- Verify whether the Launcher component is used in business workflows.
- Review endpoint logs or crash reports for launcher instability.
- Check vendor and advisory pages for updated remediation information.
- If testing is needed, use an isolated lab system only.
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-121: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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-2020-37132 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
- Medium
- CVSS
- 6.7 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
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.
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:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
6.7MediumVector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-48290CVE reference · exploit
- UltraVNC Official HomepageCVE reference · product
- VulnCheck Advisory: UltraVNC Launcher 1.2.4.0 - 'Password' Denial of ServiceCVE reference · third-party-advisory
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.
Stack-based Buffer Overflow
Stack-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.