Security readout for executives and security teams
Plain-English summary
CVE-2020-17118 is a high-severity Microsoft SharePoint remote code execution issue. A successful attack could let an attacker run code on an affected SharePoint server, but the CVSS vector indicates user interaction is required. Microsoft published vendor guidance and a patch reference.
Executive priority
Treat this as a high-priority legacy SharePoint remediation item. It has high confidentiality and integrity impact, and Microsoft published patch guidance. Urgency is highest where affected SharePoint servers remain exposed to untrusted networks or support sensitive business workflows.
Technical view
The CVSS 3.1 vector is 8.1 high: network-accessible, low attack complexity, no privileges required, user interaction required, unchanged scope, high confidentiality and integrity impact, and no availability impact. The affected products listed are SharePoint Foundation 2010 SP2, Foundation 2013 SP1, Enterprise Server 2016, and Server 2019.
Likely exposure
Exposure is most likely in organizations still operating the affected Microsoft SharePoint versions listed by the CVE bundle, especially internet-accessible or broadly reachable SharePoint deployments. The bundle does not identify affected cloud services or additional third-party products.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The CVSS exploitability metric is E:P, which indicates proof-of-concept maturity in the scoring data, but the provided sources do not include exploit details.
Researcher notes
Do not assume active exploitation from the provided bundle. Focus validation on product/version presence, Microsoft update applicability, and exposure path. The user-interaction requirement matters for risk modeling, but no source-provided exploit chain or workaround details are available here.
Mitigation direction
- Apply Microsoft’s official security update or current vendor guidance for CVE-2020-17118.
- Inventory SharePoint deployments for the affected product and version names.
- Prioritize externally reachable SharePoint servers and high-value collaboration environments.
- Check Microsoft guidance for exact update, supersedence, and support-status details.
Validation and detection
- Confirm each SharePoint server product and version against the affected list.
- Verify installed SharePoint update level matches Microsoft’s CVE guidance.
- Confirm vulnerable servers are not left untracked in asset inventory.
- Document remediation status and any vendor-approved exceptions.
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.
Execution 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-2020-17118 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
- 8.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:P/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:N/UI:R/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C2.85.2microsoftVulnerability scoring details
Base CVSS 3.1 score
8.1HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:P/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 Remote Code Execution VulnerabilityCVE reference, microsoft · vendor-advisory, patch
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17118CVE 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.