Security readout for executives and security teams
Plain-English summary
This Windows DNS flaw could allow a user who already has limited local access to expose sensitive information. It does not enable remote exploitation, data modification, or service disruption according to the supplied CVSS vector. The affected range includes multiple Windows 10, Windows 11, and Windows Server releases.
Executive priority
Address through the normal security-patching cycle, accelerating systems with shared local access, sensitive data, or elevated compromise risk. The flaw is not remotely exploitable from the supplied evidence, but its potential confidentiality impact makes prolonged exposure undesirable.
Technical view
CVE-2024-21377 is a Windows DNS information-disclosure vulnerability classified as CWE-197. Exploitation requires local access and low privileges, needs no user interaction, and may cause high confidentiality impact. The source bundle does not identify the information exposed or provide deeper root-cause details.
Likely exposure
Exposure is limited to the listed Windows client and server builds, including Server Core installations. An attacker must already have low-privileged local access. Confirm exact applicability through Microsoft because the supplied affected-product data contains overlapping version labels.
Exploitation context
The supplied record does not establish active exploitation, and the CVE is not listed as KEV. Its local, low-privilege attack path makes it more relevant after an attacker gains an account or foothold than as an initial intrusion vector.
Researcher notes
CVSS 3.1 is 5.5: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N. The record supplies CWE-197 but no technical mechanism, exposed-data description, exploit proof, or workaround. Testing should remain focused on authorized validation of patch state and affected builds.
Mitigation direction
- Apply the security update identified in Microsoft's CVE advisory.
- Confirm unsupported or legacy Windows systems receive applicable extended-security updates or vendor-directed treatment.
- Restrict unnecessary local accounts and privileges while remediation is pending.
- Consult Microsoft guidance if patching is delayed; the supplied sources name no specific workaround.
Validation and detection
- Inventory Windows editions and build numbers against the affected-product list.
- Verify the Microsoft update applicable to each affected build is installed successfully.
- Re-scan patched endpoints and investigate systems that remain vulnerable.
- Confirm remediation coverage includes Server Core and legacy Windows Server installations.
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-197: 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 lookupCVE-2024-21377 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
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/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:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C1.83.6microsoftVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/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
- Windows DNS Information Disclosure 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.
Numeric Truncation Error
Numeric Truncation Error represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.