Security readout for executives and security teams
Plain-English summary
This flaw lets an authenticated BMC administrator inject commands through ASUS BMC web management. BMCs control server hardware, so compromise can affect confidentiality, integrity, and availability. The supplied sources name specific ASUS firmware versions, but do not provide confirmed exploitation or a specific fixed version.
Executive priority
Prioritize remediation for exposed or shared-access BMC environments because BMC compromise can affect entire servers. If BMC interfaces are isolated and administrator access is tightly controlled, handle through the normal firmware maintenance cycle while tracking vendor guidance.
Technical view
CVE-2021-28203 is CWE-78 command injection in the Web Set Media Image function. A specific parameter is not filtered, allowing a remote attacker with administrator permission to execute arbitrary commands. CVSS 3.1 is 7.2, with network access, low complexity, high privileges, no user interaction, and high CIA impact.
Likely exposure
Exposure is limited to ASUS BMC firmware for Z10PR-D16 1.14.51, ASMB8-iKVM 1.14.51, and Z10PE-D16 WS 1.14.2. Risk is highest where BMC web management is reachable from broad internal networks, VPN users, vendors, or the internet.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation. Exploitation requires existing administrator permission to the BMC web interface, but the post-authentication impact is severe because arbitrary command execution on management firmware can undermine server control.
Researcher notes
Evidence is limited to the CVE description, CVSS vector, affected firmware list, and vendor/TWCERT references. The bundle does not include a patch version, exploit proof, or exploitation-in-the-wild claim. Treat validation as inventory and access-control review, not exploit reproduction.
Mitigation direction
- Check ASUS and TWCERT guidance for fixed firmware or official remediation.
- Restrict BMC web management to a dedicated management network.
- Remove internet exposure and unnecessary VPN/vendor access to BMC interfaces.
- Review and reduce BMC administrator accounts and shared credentials.
- Monitor BMC access logs for unexpected administrator activity.
Validation and detection
- Inventory ASUS BMC models and firmware versions against the affected list.
- Confirm whether BMC web management is reachable from untrusted networks.
- Verify administrator accounts are known, necessary, and individually assigned.
- Check ASUS advisory and TWCERT pages for updated remediation details.
- Review recent BMC logs for suspicious configuration or media image activity.
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-78: 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-2021-28203 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
- 7.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/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:H/UI:N/S:U/C:H/I:H/A:H1.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.2HighVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.asus.com/content/ASUS-Product-Security-Advisory/CVE reference · x_refsource_MISC
- https://www.asus.com/tw/support/callus/CVE reference · x_refsource_MISC
- https://www.twcert.org.tw/tw/cp-132-4573-aa336-1.htmlCVE 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 OS Command ('OS Command Injection')
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.