Security readout for executives and security teams
Plain-English summary
CVE-2024-43557 is a denial-of-service flaw in Microsoft’s Windows Mobile Broadband Driver. An attacker on an adjacent network could cause affected Windows systems to lose availability. The sources do not indicate data theft, privilege escalation, remote internet exploitation, or confirmed active exploitation.
Executive priority
Treat this as a normal but time-bound patching item. It can disrupt availability, but the provided evidence does not support emergency handling: no KEV listing, no confirmed exploitation, and no confidentiality or integrity impact.
Technical view
Microsoft rates this CVSS 3.1 score 6.5 with AV:A, AC:L, PR:N, UI:N, and A:H. The issue is associated with CWE-125 and CWE-20, indicating out-of-bounds read and input validation problems. Impact is availability only; confidentiality and integrity are not affected in the provided data.
Likely exposure
Exposure is limited to the listed affected Windows 10, Windows 11, Windows Server 2019, and Windows Server 2022 23H2 Server Core versions. Systems using or carrying the Windows Mobile Broadband Driver are the most relevant assets to check.
Exploitation context
The source bundle marks CISA KEV as false, and the CVSS exploit maturity is unproven. The attack vector is adjacent network, so this is not described as broad unauthenticated internet exploitation. No public exploit details are provided in the sources.
Researcher notes
The key constraints are adjacent attack vector, no privileges, no user interaction, and high availability impact. Public sources do not provide root-cause detail, trigger conditions, exploit artifacts, or compensating controls beyond Microsoft’s patched advisory.
Mitigation direction
- Apply Microsoft’s security update for CVE-2024-43557 on affected Windows versions.
- Use the Microsoft Security Update Guide to confirm applicable KBs per OS build.
- Prioritize laptops, tablets, and endpoints with mobile broadband hardware or drivers.
- Track patch completion through endpoint management and vulnerability scanning.
- If patching is delayed, review Microsoft guidance for supported workarounds.
Validation and detection
- Inventory affected Windows builds listed in the source bundle.
- Check whether the Windows Mobile Broadband Driver is present or enabled.
- Verify the Microsoft CVE-2024-43557 update is installed.
- Confirm vulnerable OS builds are no longer reported by scanners.
- Review availability-related incidents on mobile broadband-capable endpoints.
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-125: 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 lookupCWE-20: 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-2024-43557 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
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/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:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C2.83.6microsoftVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:A/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
- Windows Mobile Broadband Driver 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.
Out-of-bounds Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.