CVE-2018-8627: An information disclosure vulnerability exists when Microsoft Excel software reads out of bound memory due to an unin…
- Is it exploited?
Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of .
VulnCheck KEV lists it since . It cites 1 public report, the first from .
- How likely is exploitation in the next 30 days?
- 8.6%
EPSS score, percentile 95.1 of all scored records. A probability estimated by FIRST, not a report of exploitation.
- How severe?
- Not scored
The CVE record carries no CVSS score.
- What should I do?
CISA has set no required action, because the vulnerability is not in KEV.
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Affected
- 2010 Service Pack 2 (32-bit editions)
- 2010 Service Pack 2 (64-bit editions)
- 2016 for Mac
- 2019 for 32-bit editions
- 2019 for 64-bit editions
- 2019 for Mac
and 12 more in the table below
Source: CISA KEV 2026.10.29, as of ; VulnCheck KEV, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.
Description
An information disclosure vulnerability exists when Microsoft Excel software reads out of bound memory due to an uninitialized variable, which could disclose the contents of memory, aka "Microsoft Excel Information Disclosure Vulnerability." This affects Microsoft Office, Office 365 ProPlus, Microsoft Excel, Microsoft Excel Viewer, Excel. This CVE ID is unique from CVE-2018-8598.
Source: CVE List, as of . About the data.
What to do
Advisories and patches
The CVE record links no vendor advisory, patch or mitigation.
This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.
Affected products and versions
Versions by product, as listed in the CVE record (5 products)
| Status | Versions |
|---|---|
| Affected | 2010 Service Pack 2 (32-bit editions) |
| Affected | 2010 Service Pack 2 (64-bit editions) |
| Affected | 2016 for Mac |
| Affected | 2019 for 32-bit editions |
| Affected | 2019 for 64-bit editions |
| Affected | 2019 for Mac |
| Affected | Compatibility Pack Service Pack 3 |
| Status | Versions |
|---|---|
| Affected | 2010 Service Pack 2 (32-bit editions) |
| Affected | 2010 Service Pack 2 (64-bit editions) |
| Affected | 2013 RT Service Pack 1 |
| Affected | 2013 Service Pack 1 (32-bit editions) |
| Affected | 2013 Service Pack 1 (64-bit editions) |
| Affected | 2016 (32-bit edition) |
| Affected | 2016 (64-bit edition) |
| Status | Versions |
|---|---|
| Affected | 2007 Service Pack 3 |
| Status | Versions |
|---|---|
| Affected | Services on Microsoft SharePoint Server 2010 Service Pack 2 |
| Status | Versions |
|---|---|
| Affected | 365 ProPlus for 32-bit Systems |
| Affected | 365 ProPlus for 64-bit Systems |
Source: CVE List, as of . About the data.
Timeline
| Date | Event |
|---|---|
| CVE record published | |
| CVE record last updated |
References
2
Known exploited Microsoft vulnerabilities
- CVE-2026-96951: Microsoft Windows Command Injection Vulnerability
- CVE-2026-65660: Microsoft SharePoint Code Injection Vulnerability
- CVE-2026-81963: Microsoft Windows Link Following Vulnerability
- CVE-2026-85880: Microsoft Windows Heap-Based Buffer Overflow Vulnerability
- CVE-2019-1068: Microsoft SQL Server Remote Code Execution Vulnerability