Security readout for executives and security teams
Plain-English summary
Dell EMC iDRAC9 before 5.00.00.00 has a cross-site scripting flaw. An attacker could trick an administrator into opening a crafted link, causing malicious browser content to run in that user’s iDRAC context. This is not described as actively exploited in the provided sources.
Executive priority
Treat as a timely management-plane hygiene issue, not an emergency unless vulnerable iDRAC9 interfaces are broadly reachable or heavily used by privileged administrators.
Technical view
CVE-2021-21581 is CWE-79 in Dell EMC iDRAC9 prior to 5.00.00.00. CVSS 3.1 is 6.5 with network attack vector, low complexity, no privileges required, and required user interaction. Reported impact is high integrity impact, with no confidentiality or availability impact.
Likely exposure
Organizations with Dell iDRAC9 management interfaces running firmware before 5.00.00.00 are potentially exposed, especially where administrators access iDRAC through browsers and can be socially engineered into opening external links.
Exploitation context
The sources describe link-based exploitation requiring victim interaction. The vulnerability is not listed as KEV in the provided bundle, and no cited source here confirms active exploitation or public exploit use.
Researcher notes
The bundle does not provide specific vulnerable parameters, proof of concept, or detailed model coverage beyond iDRAC9 prior to 5.00.00.00. Avoid assuming broader Dell product impact or active exploitation without additional evidence.
Mitigation direction
- Upgrade Dell EMC iDRAC9 to 5.00.00.00 or later.
- Review Dell advisory 000189193 for vendor-specific remediation guidance.
- Restrict iDRAC access to trusted management networks.
- Warn administrators not to open unsolicited iDRAC-related links.
Validation and detection
- Inventory Dell iDRAC9 assets and firmware versions.
- Flag any iDRAC9 firmware below 5.00.00.00.
- Confirm remediation status against Dell advisory 000189193.
- Review management-plane exposure and administrator browser access paths.
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
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CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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 lookupCVE-2021-21581 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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:R/S:U/C:N/I:H/A:N2.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.dell.com/support/kbdoc/000189193CVE 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.