Security readout for executives and security teams
Plain-English summary
This flaw could let an attacker who already has limited access to an affected Windows system gain substantially greater control. Successful exploitation could compromise sensitive information, alter systems, or disrupt operations. It is not described as a remote entry point, but it can amplify an existing compromise.
Executive priority
Treat this as an accelerated patching priority, particularly on shared servers and endpoints where low-privileged access is plausible. It presents serious post-compromise impact but is not evidenced as actively exploited or remotely reachable. Track affected-system discovery and update completion through normal vulnerability governance.
Technical view
CVE-2024-21405 is an MSMQ elevation-of-privilege vulnerability rated CVSS 7.0. The vector indicates local access, low privileges, high attack complexity, no user interaction, unchanged scope, and high confidentiality, integrity, and availability impacts. It is classified as CWE-591.
Likely exposure
Potential exposure includes the listed Windows 10, Windows 11, and Windows Server releases. Organizations should identify affected builds and determine where MSMQ is deployed or used. The supplied evidence does not establish whether MSMQ configuration alone determines vulnerability, so confirm applicability through Microsoft's product-specific guidance.
Exploitation context
The CVSS vector requires an attacker to have low-privileged local access and overcome high attack complexity. The CVE is not listed in KEV, and the supplied sources provide no evidence of active exploitation, public exploit availability, or observed indicators of compromise.
Researcher notes
The bundle provides the severity vector and CWE classification but no root-cause detail, exploitation mechanics, indicators, or named workaround. CWE-591 and the vendor advisory should anchor deeper investigation. Do not infer affected versions beyond Microsoft's table or claim MSMQ configuration eliminates exposure without vendor confirmation.
Mitigation direction
- Apply Microsoft's applicable security update for each affected Windows product.
- Prioritize systems where untrusted users or compromised applications can obtain local access.
- Inventory MSMQ deployments and restrict unnecessary local access pending remediation.
- Consult Microsoft's advisory for product-specific servicing prerequisites and supported update paths.
Validation and detection
- Compare operating-system editions and builds with Microsoft's affected-product table.
- Verify the applicable Microsoft security update is installed successfully.
- Record whether MSMQ is installed or used to refine exposure decisions.
- Re-scan remediated systems and investigate failed or pending updates.
- Monitor for unexpected privilege elevation; supplied sources provide no CVE-specific indicators.
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-591: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupCVE-2024-21405 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 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
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.
SSVC decision data
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:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C15.9microsoftVulnerability scoring details
Base CVSS 3.1 score
7HighVector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- Microsoft Message Queuing (MSMQ) Elevation of Privilege VulnerabilityCVE reference, microsoft · vendor-advisory, patch
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.
Sensitive Data Storage in Improperly Locked Memory
Sensitive Data Storage in Improperly Locked Memory represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.