Security readout for executives and security teams
Plain-English summary
A malicious website could abuse NC Launcher2’s custom protocol handler to run commands on a visitor’s computer. The user must visit the attacker-controlled page, but no login or local privileges are required. Impact is high because successful exploitation runs code as the current user.
Executive priority
Prioritize this as high where NC Launcher2 is present. The vulnerability can turn a malicious webpage visit into local code execution, but urgency should be driven by confirmed install footprint and whether a vendor-supported update or removal path is available.
Technical view
CVE-2019-12805 is a CWE-77 command injection flaw in NCSOFT NC Launcher2 2.4.1.691 and earlier. The vulnerable custom protocol handler can be invoked remotely through web content. CVSS 3.0 is 8.8 with network attack vector, low complexity, no privileges required, and user interaction required.
Likely exposure
Exposure is limited to endpoints with NCSOFT NC Launcher2 version 2.4.1.691 or earlier installed and registered as a protocol handler. Consumer or gaming-capable workstations are the most likely locations. Servers are unlikely unless the launcher was installed there.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. Exploitation requires social engineering or web traffic leading the user to a malicious page. The business concern is endpoint compromise from browsing, not unauthenticated server-side exposure.
Researcher notes
Key missing evidence is the exact fixed version or detailed vendor mitigation. Avoid assuming broader NCSOFT products are affected. Validation should focus on launcher version, protocol handler registration, and endpoint telemetry rather than internet-facing scanning.
Mitigation direction
- Inventory endpoints for NC Launcher2 2.4.1.691 and earlier.
- Check NCSOFT or KR-CERT guidance for a supported fixed version.
- Update, remove, or disable NC Launcher2 where vendor guidance supports it.
- Limit use on privileged or shared workstations until remediated.
- Warn affected users against untrusted links while remediation is pending.
Validation and detection
- Confirm installed NC Launcher2 versions across managed endpoints.
- Verify whether the custom protocol handler remains registered after remediation.
- Check vendor advisory details before declaring a fixed state.
- Review EDR telemetry for suspicious launcher or browser child processes.
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-77: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2019-12805 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
- 8.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/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.
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:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.8HighVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.boho.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=35106CVE reference · x_refsource_CONFIRM
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.
Improper Neutralization of Special Elements used in a Command ('Command Injection')
Improper Neutralization of Special Elements used in a Command ('Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.