Security readout for executives and security teams
Plain-English summary
A remote, unauthenticated attacker may disrupt vulnerable Windows systems using Internet Connection Sharing, causing loss of service rather than data theft or modification. The broad Windows client and server footprint makes asset identification important, especially where ICS is enabled and reachable.
Executive priority
Treat this as a high-priority availability risk, particularly for operationally important Windows servers or endpoints exposing ICS. Schedule prompt patching through normal emergency or accelerated maintenance processes, while prioritizing reachable systems. No evidence supplied indicates data compromise or confirmed active exploitation.
Technical view
CVE-2024-21348 is an ICS denial-of-service vulnerability classified as CWE-122. Its CVSS 3.1 vector indicates network access, low complexity, no privileges, no user interaction, unchanged scope, and high availability impact, with no stated confidentiality or integrity impact.
Likely exposure
The supplied affected list spans multiple Windows 10, Windows 11, and Windows Server releases. Practical exposure depends on whether ICS is present, enabled, and network-reachable. The bundle does not identify ports, configurations, or boundary conditions, so those details require Microsoft guidance.
Exploitation context
The bundle does not support a claim of active exploitation: KEV is false and exploit maturity is listed as unknown. The low-complexity, unauthenticated network vector nevertheless warrants timely remediation where vulnerable ICS services are reachable.
Researcher notes
The affected data contains overlapping and unusual release labels, including duplicate Windows 10 1809 entries and Windows 11 “22H3.” Validate exact applicability in MSRC before concluding exposure. The sources provide no crash mechanism, reachable interface details, exploit demonstration, or telemetry supporting exploitation.
Mitigation direction
- Apply the applicable Microsoft security update identified in the MSRC advisory.
- Prioritize systems where Internet Connection Sharing is enabled or exposed to untrusted networks.
- Review Microsoft guidance for any product-specific prerequisites or mitigations.
- Restrict unnecessary network access to ICS while remediation is pending.
Validation and detection
- Inventory affected Windows editions, versions, and installation types from the supplied product list.
- Confirm whether Internet Connection Sharing is enabled on identified systems.
- Verify installed security-update status against the Microsoft advisory.
- Check network controls limiting ICS reachability from untrusted sources.
- Monitor affected systems for unexplained availability failures until remediation is complete.
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-122: 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-2024-21348 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
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C3.93.6microsoftVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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
- Internet Connection Sharing (ICS) Denial of Service 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.
Heap-based Buffer Overflow
Heap-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.