THREATPORT/VULNERABILITY/CVE-2017-8663
HIGH SEVERITY

CVE-2017-8663

Outlook vulnerability

CVSS
7.8
EPSS
20.1%
EPSS pct
97th
Exploited
No known
Microsoft Outlook 2007 SP3, Outlook 2010 SP2, Outlook 2013 SP1, Outlook 2013 RT SP1, and Outlook 2016 as packaged in Microsoft Office allows a remote code execution vulnerability due to the way Microsoft Outlook parses specially crafted email messages, aka "Microsoft Office Outlook Memory Corruption Vulnerability"
Affected vendor
Microsoft
Affected product
Outlook
CVSS vector
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-119 — Improper Restriction of Operations within Memory Bounds
Published
2017-08-01

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, high impact to integrity, high impact to availability.

Its EPSS score of 20.1% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2017-8663

  • Confirm whether Microsoft Outlook is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2017-8663.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2017-8663

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2017-8663 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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