Security readout for executives and security teams
Plain-English summary
This is a critical remote code execution issue in Dream Security’s MagicLine PKI software. A remote attacker could send a crafted HTTP request to an affected MagicLine4NX.exe instance and potentially run arbitrary code. The public bundle names version 1.0.0.17 only, so scope beyond that version is not established here.
Executive priority
Treat this as urgent where MagicLine4NX.exe 1.0.0.17 is present, especially on internet-facing or broadly reachable systems. Business risk is high because successful exploitation could allow full code execution without authentication. Confirm exposure before broad remediation claims.
Technical view
CVE-2021-26606 affects Dream Security MagicLine4NX.exe 1.0.0.17. The issue is described as insufficient validation of an authorization certificate and mapped to buffer overflow and input validation weaknesses. CVSS 3.1 is 9.8: network-reachable, low complexity, unauthenticated, no user interaction, with high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most likely where Dream Security PKI Security Solution components include MagicLine4NX.exe version 1.0.0.17. The supplied sources do not list CPEs, deployment models, or additional affected versions, so teams should verify installed software directly.
Exploitation context
The CVE description supports remote exploitation via crafted HTTP request and arbitrary command execution. The bundle marks KEV as false and provides no cited evidence of active exploitation, so active exploitation should not be asserted from these sources alone.
Researcher notes
The source bundle is limited: one affected executable version is named, no CPEs are listed, and no patch details are provided. Analysis should stay anchored to MagicLine4NX.exe 1.0.0.17 unless additional vendor evidence expands scope.
Mitigation direction
- Check Dream Security or KrCERT guidance for fixed builds or official workarounds.
- Upgrade, remove, or disable MagicLine4NX.exe 1.0.0.17 according to vendor guidance.
- Restrict network access to systems running the affected component where operationally possible.
- Prioritize monitoring around systems that expose the affected program to untrusted networks.
Validation and detection
- Inventory endpoints and servers for Dream Security MagicLine components.
- Confirm whether MagicLine4NX.exe version 1.0.0.17 is installed.
- Review vendor and KrCERT advisory details for remediation status.
- Check exposure paths for HTTP access to the affected program.
- Verify remediation by confirming the affected version is absent or isolated.
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-120: 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 lookupCWE-20: 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 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-2021-26606 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
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/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.
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:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://boho.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=36174CVE reference · x_refsource_MISC
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.
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.