Security readout for executives and security teams
Plain-English summary
MaxBoard has reported SQL injection and local file inclusion issues that can expose sensitive information and potentially support privilege escalation. The public sources do not identify affected version ranges or a named patch. Treat any reachable MaxBoard deployment as potentially exposed until vendor or KrCERT guidance confirms otherwise.
Executive priority
Prioritize discovery and exposure reduction. The issue is high severity because unauthenticated network access may leak sensitive data, but urgency depends on whether MaxBoard is present and exposed.
Technical view
CVE-2021-26633 covers SQL injection and LFI in MaxBoard. The CVSS 3.1 vector is AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N, score 7.5. Sources describe exploitation through variable manipulation and arbitrary file inclusion, but do not provide affected version boundaries, exploit status, or remediation specifics.
Likely exposure
Exposure is most relevant for organizations running Max Yi MaxBoard, especially if reachable from the internet or untrusted networks. Versions are listed as unspecified, so product presence matters more than version matching in initial triage.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The vulnerability is network-reachable, unauthenticated, low complexity, and primarily confidentiality-impacting based on CVSS, but public evidence is limited.
Researcher notes
Evidence is sparse: product and vendor are named, versions are unspecified, and only CWE-89 is listed despite the LFI description. Do not assume exploit availability or a specific patch without checking the advisory source.
Mitigation direction
- Inventory MaxBoard deployments and remove unused or externally exposed instances.
- Check Max Yi or KrCERT guidance for patched versions or official mitigations.
- Apply the vendor-supported update or workaround when identified.
- Restrict access with VPN, allowlists, or application gateway controls where feasible.
- Increase logging and alerting for suspicious file access or database error patterns.
Validation and detection
- Confirm whether MaxBoard is deployed, internet-facing, or reachable from untrusted networks.
- Map all MaxBoard instances to owners, hosting locations, and business functions.
- Review KrCERT and vendor sources for version-specific remediation information.
- Inspect application and web logs for unusual parameter use or sensitive file access attempts.
- Verify access restrictions and monitoring controls are active around any remaining deployments.
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-89: Database access and collection lookup
Injection into data stores can inform collection, data access, and exfiltration detection reviews. 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 lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupDatabase behavior lookup
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-26633 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
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A: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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66745CVE 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.
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.