CVE-2018-8382

Excel vulnerability

CVSS

5.5

EPSS

12.3%

EPSS pct

96th

Exploited

No known

An information disclosure vulnerability exists when Microsoft Excel improperly discloses the contents of its memory, aka "Microsoft Excel Information Disclosure Vulnerability." This affects Microsoft Excel Viewer, Microsoft Office, Microsoft Excel.

Affected vendor

Microsoft

Affected product

Excel

CVSS vector

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

Weakness type (CWE)

CWE-200 — Exposure of Sensitive Information

Published

2018-08-15

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable with local access, low attack complexity, requiring no privileges, user interaction. Successful exploitation leads to high impact to confidentiality.

Its EPSS score of 12.3% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 96% of all scored CVEs.

Check your external exposure to CVE-2018-8382

Confirm whether Microsoft Excel is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2018-8382.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2018-8382

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2018-8382 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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