Security readout for executives and security teams
Plain-English summary
ASUS BMC web management firmware has a Radius configuration flaw where overly long user input can overflow a buffer. The cited impact is service disruption, not data theft. Exploitation requires privileged BMC access, so business urgency is highest where management interfaces are reachable beyond tightly controlled admin networks.
Executive priority
Treat this as a moderate operational risk. Prioritize remediation for BMCs exposed outside restricted admin networks or managed by many privileged users, because disruption of BMC web management can affect server administration during incidents.
Technical view
CVE-2021-28175 is a CWE-120 buffer overflow in the Radius configuration function of ASUS BMC firmware web management. CVSS 3.1 is 4.9, AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H. Affected versions listed are Z10PR-D16 1.14.51, ASMB8-iKVM 1.14.51, and Z10PE-D16 WS 1.14.2.
Likely exposure
Exposure is likely limited to environments running the listed ASUS BMC firmware versions, especially where privileged BMC users can access the web management interface over a network.
Exploitation context
The source bundle does not show CISA KEV listing or other evidence of active exploitation. The CVSS vector requires high privileges and no user interaction. Reported impact is abnormal termination of the web service, affecting availability.
Researcher notes
Evidence supports a privileged, network-reachable buffer overflow with availability impact only. The provided sources do not name fixed versions, exploit maturity, or detailed technical root cause beyond missing string-length verification in Radius configuration input handling.
Mitigation direction
- Inventory ASUS BMC firmware and identify the listed affected products and versions.
- Check ASUS and TWCERT advisories for supported fixed firmware or vendor-directed remediation.
- Restrict BMC web management access to dedicated administrative networks.
- Review and minimize privileged BMC accounts with Radius configuration access.
- Monitor BMC web service crashes and unexpected management-plane restarts.
Validation and detection
- Confirm whether any BMCs run Z10PR-D16 1.14.51, ASMB8-iKVM 1.14.51, or Z10PE-D16 WS 1.14.2.
- Verify BMC web interfaces are not internet-exposed or broadly reachable.
- Review BMC account permissions for users able to modify Radius settings.
- Check operational logs for abnormal web service termination events.
- Document current ASUS guidance and planned firmware remediation status.
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
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Open ATT&CK lookupCVE-2021-28175 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
- 4.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/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:N/I:N/A:H1.23.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.9MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.twcert.org.tw/tw/cp-132-4543-98220-1.htmlCVE reference · x_refsource_MISC
- 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
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.