Security readout for executives and security teams
Plain-English summary
An authenticated SharePoint user could place unsafe content into a web page that misleads another user. Successful abuse requires the victim to interact with the affected content. The reported impact is limited disclosure or modification of information, with no availability impact.
Executive priority
Schedule remediation through the normal security-update process, accelerating exposed or broadly writable SharePoint deployments. The issue is not critical because it requires authentication and victim interaction, but successful spoofing could support phishing, session misuse, or unauthorized information changes within trusted SharePoint pages.
Technical view
CVE-2026-45467 is a network-reachable stored or reflected cross-site scripting weakness (CWE-79) classified by Microsoft as spoofing. Exploitation requires low privileges and user interaction. CVSS 3.1 is 4.6, with low confidentiality and integrity impact and no availability impact.
Likely exposure
Potentially exposed environments run SharePoint Enterprise Server 2016, SharePoint Server 2019, or SharePoint Server Subscription Edition and allow authorized users to contribute content. Internet accessibility may increase opportunities, but authentication and victim interaction remain required.
Exploitation context
The supplied sources do not report active exploitation, and the CVE is not listed as KEV in the bundle. The attack is network-based, low complexity, requires an authorized account, and depends on another user interacting with attacker-influenced content.
Researcher notes
The record describes improper neutralization during web-page generation and maps to CWE-79, while Microsoft classifies the outcome as spoofing. The bundle does not provide vulnerable input locations, affected components, KB identifiers, fixed builds, or proof-of-concept details; consult the vendor advisory for those specifics.
Mitigation direction
- Review the Microsoft advisory and install the applicable security update for each affected SharePoint deployment.
- Prioritize externally accessible farms and environments where less-trusted users can create or modify content.
- Restrict SharePoint content-authoring permissions to users who require them until remediation is confirmed.
- Follow Microsoft guidance for any product-specific prerequisites, deployment sequencing, or compensating controls.
Validation and detection
- Inventory SharePoint 2016, 2019, and Subscription Edition servers, including externally accessible instances.
- Compare each server's build and installed updates against the Microsoft CVE advisory.
- Confirm security updates were successfully applied across every server in each SharePoint farm.
- Review content-authoring permissions and identify accounts that do not require contribution access.
- Use approved defensive testing to confirm untrusted page input is safely neutralized after remediation.
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-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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-2026-45467 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
- 4.6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/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:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C2.12.5microsoftVulnerability scoring details
Base CVSS 3.1 score
4.6MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/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
- Microsoft SharePoint Server Spoofing 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.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.