Security readout for executives and security teams
Plain-English summary
This is a high-severity SharePoint spoofing vulnerability. An attacker with limited privileges could abuse affected SharePoint deployments if a user interaction condition is met. Microsoft lists official remediation, so organizations running affected SharePoint versions should confirm patch coverage rather than treat this as theoretical backlog work.
Executive priority
High priority for organizations running affected on-premises SharePoint. The issue has severe potential impact and an official Microsoft fix. Confirm whether the listed products exist in the estate, patch them, and escalate any unsupported or exposed systems.
Technical view
CVE-2020-17115 affects SharePoint Enterprise Server 2016, SharePoint Server 2019, and SharePoint Foundation 2010 SP2/2013 SP1. CVSS 3.1 is 8.0: network attack vector, low complexity, low privileges required, user interaction required, and high confidentiality, integrity, and availability impact. Microsoft marks remediation as official.
Likely exposure
Exposure is most likely in organizations still operating the listed on-premises SharePoint versions, especially collaboration portals reachable by broad internal or external user populations. The bundle does not identify SharePoint Online exposure.
Exploitation context
The CVE is not marked as CISA KEV in the supplied data. The CVSS exploit maturity value is unproven, and no cited source in the bundle states active exploitation. Treat exploitation status as unconfirmed.
Researcher notes
The public bundle is sparse: it names the vulnerability class, affected products, CVSS vector, and Microsoft advisory links, but not root cause details, indicators, or exploitation examples. Avoid assuming exploitability beyond the CVSS conditions and Microsoft advisory.
Mitigation direction
- Review Microsoft MSRC guidance for CVE-2020-17115.
- Apply the Microsoft security update for each affected SharePoint version.
- Prioritize internet-facing and broadly accessible SharePoint farms.
- Retire or isolate unsupported legacy SharePoint deployments where patching is not viable.
- Document any unpatched exception with compensating controls and owner.
Validation and detection
- Inventory SharePoint Enterprise Server 2016 and SharePoint Server 2019 farms.
- Check for SharePoint Foundation 2010 SP2 or 2013 SP1 remnants.
- Verify the relevant Microsoft update is installed on every SharePoint server.
- Confirm externally reachable SharePoint endpoints are patched first.
- Record patch status, version evidence, and exception rationale.
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.
CVE-2020-17115 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:C2.15.9microsoftVulnerability 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
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
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17115CVE reference, CVE · 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.