Security readout for executives and security teams
Plain-English summary
An authenticated SharePoint user could inject content that runs in another user’s browser, enabling convincing spoofed content and limited access to or modification of information. A victim must interact with the malicious content. The issue affects listed on-premises SharePoint Server editions; the supplied evidence does not establish impact to SharePoint Online.
Executive priority
Schedule remediation through the normal vulnerability-management cycle, with earlier action for internet-facing or widely writable SharePoint sites. The moderate severity and required authentication reduce urgency, but user interaction can still expose or alter information and support credible internal spoofing.
Technical view
CVE-2026-45468 is a CWE-79 cross-site scripting flaw caused by improper input neutralization during web-page generation. Exploitation is network-accessible, requires low privileges and user interaction, and can cause low confidentiality and integrity impact without availability impact. The supplied CVSS 3.1 score is 4.6.
Likely exposure
Exposure exists where affected SharePoint Enterprise Server 2016, Server 2019, or Subscription Edition deployments accept content from authorized, potentially untrusted users. Risk increases for externally reachable or broadly accessible deployments. The supplied version data is limited to 16.0.0 and does not provide precise build-level boundaries.
Exploitation context
The attacker must already be authorized and persuade another user to interact with crafted SharePoint content. The CVSS vector reports low attack complexity. The CVE is not listed as KEV, and the supplied sources provide no evidence of active exploitation or public exploit availability.
Researcher notes
The record identifies CWE-79 but does not specify whether the XSS is stored, reflected, or DOM-based, nor which input or component is vulnerable. The vector is 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. Build-level affected and fixed ranges require confirmation from Microsoft.
Mitigation direction
- Consult the Microsoft advisory and apply the applicable security update for each affected SharePoint deployment.
- Prioritize externally reachable systems and sites where untrusted or low-privilege users can publish content.
- Restrict content-authoring privileges until updates are confirmed where prompt patching is not possible.
- Follow Microsoft guidance for any prerequisites, installation sequencing, or post-update actions.
Validation and detection
- Inventory SharePoint Server editions, versions, builds, and network exposure.
- Compare installed build and update status with the Microsoft CVE advisory.
- Confirm the applicable security update installed successfully on every SharePoint server.
- Review who can author content and reduce unnecessary low-privilege publishing access.
- Test affected publishing workflows after remediation without reproducing malicious payloads.
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-2026-45468 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.