Security readout for executives and security teams
Plain-English summary
CVE-2020-17125 is a Microsoft Excel remote code execution vulnerability. A user must open a malicious file or content for exploitation. Successful exploitation could let an attacker run code with the user’s privileges, threatening data confidentiality, integrity, and system availability.
Executive priority
Treat as a high-priority patching item for Office environments, especially where users handle outside documents. It is not listed as known exploited in the provided sources, but impact is severe if triggered.
Technical view
MSRC rates this as an Excel RCE with CVSS 3.1 score 7.8: AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. Affected products include Excel 2010/2013/2016, Office 2019, Microsoft 365 Apps for Enterprise, Office Online Server, and Office Web Apps 2013, per the provided affected list.
Likely exposure
Organizations with older or unpatched Microsoft Office/Excel deployments, Office Online Server, or Office Web Apps 2013 are the likely exposure set. Risk is highest where users can receive and open external spreadsheets or Office documents.
Exploitation context
The CVSS vector requires user interaction and local execution context, so phishing or document-based delivery is the practical concern. The source bundle does not show CISA KEV listing or cited evidence of active exploitation.
Researcher notes
Evidence is limited to CVE/MSRC data in the bundle. No CWE, exploit details, or independent exploitation reporting were provided. Avoid assuming active exploitation without KEV or another cited source.
Mitigation direction
- Apply Microsoft security updates referenced in the MSRC advisory.
- Inventory affected Office, Excel, Office Online Server, and Office Web Apps versions.
- Prioritize systems used for external email, file sharing, or document intake.
- For unsupported products, follow Microsoft guidance for upgrade or replacement paths.
Validation and detection
- Confirm installed Office/Excel versions against the affected product list.
- Verify relevant Microsoft security updates are installed from MSRC guidance.
- Check server-side Office components, not only desktop Excel installations.
- Review vulnerability scanner results for CVE-2020-17125 coverage.
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-2020-17125 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
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/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:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C1.85.9microsoftVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:N/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 Excel Remote Code Execution VulnerabilityCVE reference, microsoft · vendor-advisory, patch
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17125CVE 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.