Security readout for executives and security teams
Plain-English summary
CVE-2021-1712 is a high-severity Microsoft SharePoint elevation-of-privilege issue. A low-privileged authenticated user could potentially gain broader access if a user interaction condition is met. For organizations still running affected SharePoint versions, this is a meaningful business risk because SharePoint often stores sensitive internal documents and workflows.
Executive priority
Treat this as a high-priority patching item for affected on-premises SharePoint. It is not evidenced as actively exploited in the provided sources, but the potential data and workflow impact is high.
Technical view
The source bundle identifies affected Microsoft SharePoint Foundation 2013 SP1, SharePoint Enterprise Server 2016, and SharePoint Server 2019. CVSS 3.1 is 8.0 with network attack vector, low complexity, low privileges required, user interaction required, unchanged scope, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most likely in on-premises SharePoint deployments matching the affected versions, especially internet-reachable or broadly accessible intranet portals with many low-privileged users.
Exploitation context
The bundle does not show CISA KEV listing or cited evidence of active exploitation. CVSS indicates exploitation requires low privileges and user interaction, but public exploit maturity is listed as unproven.
Researcher notes
No CWE or detailed root cause is provided in the source bundle. Validation should focus on affected product/version confirmation, patch state, exposure level, and whether low-privileged users can reach vulnerable SharePoint surfaces.
Mitigation direction
- Review the Microsoft MSRC advisory for exact applicable SharePoint updates.
- Apply Microsoft-provided security updates for affected SharePoint versions.
- Prioritize externally reachable or high-value SharePoint farms first.
- Restrict unnecessary access to SharePoint until updates are verified.
- Monitor vendor guidance for superseded or version-specific update requirements.
Validation and detection
- Inventory SharePoint 2013 Foundation SP1, 2016 Enterprise, and 2019 servers.
- Compare installed builds against Microsoft’s CVE-2021-1712 advisory guidance.
- Confirm security updates are applied across all farm servers.
- Review SharePoint exposure: internet access, user populations, and privilege boundaries.
- Check recent logs for suspicious privilege or content access anomalies.
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.
Privilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-1712 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 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/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.
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:H/I:H/A:H/E:U/RL:O/RC:C2.15.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- Microsoft SharePoint Elevation of Privilege VulnerabilityCVE reference · vendor-advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1712CVE reference · x_refsource_MISC, x_transferred
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.