CVE-2018-8627

5.5 MEDIUM 9% exploit odds Fix listed Memory safety

What it is

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.

At a glance

Exploitability: Can be exploited locally on the machine without logging in, but needs a user to act. High risk of data exposure.
Exploit odds: 8.6% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2018-12-12 00:29 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 02:05 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 8.6% in the next 30 days (EPSS).
Severity: 5.5 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2018-12-12 00:29 UTC
Last modified: 2026-06-17 02:05 UTC
Exploit probability: 8.6% · EPSS, next 30 days
Weakness: CWE-908
Record status: Modified

Affected

Microsoft Excel 2010
Microsoft Excel 2013
Microsoft Excel 2016
Microsoft Excel Viewer 2007
Microsoft Office 2010
Microsoft Office 2016
Microsoft Office 2019
Microsoft Office 365 Proplus

Attack profile CVSS 3.0 · 5.5

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: Required
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Raw vector

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2018-8627.md and follow it. Check whether this project is affected by CVE-2018-8627. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record