Security readout for executives and security teams
Plain-English summary
This SharePoint flaw can let a logged-in attacker run code on affected servers over the network. Because CISA lists it as exploited and Microsoft has published guidance, exposed on-premises SharePoint 2016 and 2019 environments should be treated as urgent remediation targets.
Executive priority
Treat this as a high-priority patch and exposure-reduction issue. The vulnerability affects enterprise collaboration infrastructure, has full-impact CVSS consequences, and is listed in CISA KEV, which makes delay materially risky for exposed deployments.
Technical view
CVE-2025-49704 is a CWE-94 code injection issue in Microsoft Office SharePoint. The CVSS 3.1 score is 8.8 with network access, low complexity, low privileges, no user interaction, and high confidentiality, integrity, and availability impact.
Likely exposure
Organizations running Microsoft SharePoint Enterprise Server 2016 or SharePoint Server 2019 are the named affected population. Risk is highest where authenticated users can reach SharePoint over the network, especially internet-facing or partner-accessible deployments.
Exploitation context
Active exploitation is supported by the CISA KEV listing and Microsoft’s referenced blog on active exploitation of on-premises SharePoint vulnerabilities. The provided bundle does not include exploit mechanics, attacker scale, or victim details.
Researcher notes
The source bundle confirms code injection, authenticated network attack prerequisites, affected SharePoint 2016 and 2019 products, patch availability, and KEV status. It does not provide proof-of-concept details, affected build ranges beyond version 16.0.0, or detection indicators.
Mitigation direction
- Apply Microsoft updates from the MSRC advisory for affected SharePoint servers.
- Prioritize internet-facing and broadly reachable SharePoint deployments first.
- Restrict SharePoint access to trusted networks until patched where operationally feasible.
- Review Microsoft’s latest advisory for any environment-specific guidance.
- Plan emergency change windows for high-exposure on-premises instances.
Validation and detection
- Inventory SharePoint Enterprise Server 2016 and SharePoint Server 2019 instances.
- Confirm each affected server has the applicable Microsoft update installed.
- Identify SharePoint instances reachable from the internet or untrusted networks.
- Review authentication logs for unusual access to SharePoint before patching.
- Check CISA KEV and Microsoft guidance for updated remediation deadlines or notes.
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-94: 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2025-49704 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
- 8.8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.
CISA KEV status
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:H/I:H/A:H/E:U/RL:O/RC:C2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- Microsoft SharePoint Remote Code Execution VulnerabilityCVE reference · vendor-advisory, patch
- https://www.microsoft.com/en-us/security/blog/2025/07/22/disrupting-active-exploitation-of-on-premises-sharepoint-vulnerabilities/CVE reference · vendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-49704CVE reference · government-resource
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 Control of Generation of Code ('Code Injection')
Improper Control of Generation of Code ('Code Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.