Security readout for executives and security teams
Plain-English summary
A user with valid SharePoint access may be able to make an affected server unavailable. The issue does not indicate data theft or modification, but an outage could disrupt collaboration, document access, and dependent business processes.
Executive priority
Schedule prompt remediation through the normal security-update process. Escalate priority for business-critical or widely accessible SharePoint environments because successful exploitation could cause substantial availability loss, although active exploitation is not evidenced here.
Technical view
CVE-2024-43466 is a deserialization weakness (CWE-502) affecting listed SharePoint Server editions. Its CVSS 3.1 score is 6.5: network-accessible, low complexity, low privileges, no user interaction, unchanged scope, and high availability impact without confidentiality or integrity impact.
Likely exposure
Exposure is most likely where SharePoint Enterprise Server 2016, Server 2019, or Subscription Edition is deployed and reachable by authenticated, low-privileged users. The supplied version data lists 16.0.0 but does not provide enough build detail for definitive exposure decisions.
Exploitation context
The supplied sources do not establish active exploitation, and the CVE is not listed as KEV in the bundle. The CVSS vector reports low attack complexity and required low privileges, making authenticated misuse plausible, but no exploit availability or observed campaign evidence is provided.
Researcher notes
The strongest technical indicators are CWE-502 and the CVSS vector. The bundle does not describe the vulnerable component, deserialization path, denial-of-service mechanism, affected build ranges, or detection artifacts. Researchers should use Microsoft’s advisory for build-specific applicability and avoid inferring remote unauthenticated exploitation.
Mitigation direction
- Review Microsoft’s CVE advisory and apply the applicable SharePoint security update.
- Prioritize externally reachable or broadly accessible SharePoint farms.
- Restrict SharePoint access to necessary users and trusted networks while remediation is pending.
- Monitor SharePoint health and availability for abnormal service disruption.
Validation and detection
- Inventory SharePoint editions, farm roles, and installed build numbers.
- Compare installed builds with Microsoft’s CVE advisory and applicable update guidance.
- Confirm the required update is installed across every SharePoint server.
- Verify normal service health after updating and review logs for unexplained outages.
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-502: Code execution behavior lookup
Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process telemetry. 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-2024-43466 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:N/AC:L/PR:L/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:L/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:N/AC:L/PR:L/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
- Microsoft SharePoint Server 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.
Deserialization of Untrusted Data
Deserialization of Untrusted Data represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.