Security readout for executives and security teams
Plain-English summary
This vulnerability affects specific ASUS BMC firmware web management functions. An attacker who already has administrator access to the BMC could abuse insufficient path filtering to read system files. It is not shown as actively exploited in the supplied sources, but BMC exposure can carry high operational risk.
Executive priority
Treat this as a targeted infrastructure exposure issue, not a mass unauthenticated internet worm scenario. Prioritize environments where affected BMCs are externally reachable, shared-admin, or manage sensitive production servers.
Technical view
CVE-2021-28205 is a CWE-22 path traversal flaw in ASUS BMC firmware's Delete SOL video file function. A specific parameter is not filtered, allowing a remote administrator-level user to traverse paths and access system files. Impact is confidentiality only per CVSS 3.1: 4.9.
Likely exposure
Likely exposure is limited to environments running ASUS BMC firmware for Z10PR-D16 1.14.51, ASMB8-iKVM 1.14.51, or Z10PE-D16 WS 1.14.2. Risk increases if BMC web management is reachable beyond a tightly controlled management network.
Exploitation context
The supplied sources do not show CISA KEV listing or confirmed active exploitation. Exploitation requires network access to the BMC web management interface and administrator privileges. That requirement lowers broad exploitation likelihood, but compromised BMC admin credentials could make file access impactful.
Researcher notes
The CVSS vector is AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N. Evidence identifies the vulnerable function and affected firmware versions, but the supplied bundle does not provide exploit details, fixed versions, or confirmed in-the-wild activity.
Mitigation direction
- Check ASUS and TWCERT guidance for affected firmware updates or vendor mitigations.
- Restrict BMC web management to a dedicated management network or VPN.
- Remove public internet exposure for affected BMC interfaces.
- Review and tighten BMC administrator account access.
- Monitor for unusual BMC administrator activity and file access indicators.
Validation and detection
- Inventory ASUS BMC models and firmware versions across server assets.
- Confirm whether Z10PR-D16, ASMB8-iKVM, or Z10PE-D16 WS firmware matches affected versions.
- Verify BMC web interfaces are not internet-accessible.
- Review BMC admin accounts for unauthorized or stale privileges.
- Check vendor advisory status before closing remediation.
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-22: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection 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 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-2021-28205 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: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:H/UI:N/S:U/C:H/I:N/A:N1.23.6Primary 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:H/I:N/A:N
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-132-4575-2e32d-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 Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.