How severe is CVE-2018-8244?

CVE-2018-8244 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2018-8244 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-8244?

CVE-2018-8244 primarily affects Microsoft Office. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-8244?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-8244 published?

CVE-2018-8244 was published on 2018-06-14 and last updated on 2026-06-17.

CVE-2018-8244

CVE-2018-8244 is a medium-severity vulnerability in Microsoft Office with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Microsoft Office
Published: 2018-06-14
Last modified: 2026-06-17

Description

An elevation of privilege vulnerability exists when Microsoft Outlook does not validate attachment headers properly, aka "Microsoft Outlook Elevation of Privilege Vulnerability." This affects Microsoft Office, Microsoft Outlook.

Frequently asked questions

What is CVE-2018-8244?: An elevation of privilege vulnerability exists when Microsoft Outlook does not validate attachment headers properly, aka "Microsoft Outlook Elevation of Privilege Vulnerability." This affects Microsoft Office, Microsoft Outlook.
How severe is CVE-2018-8244?: CVE-2018-8244 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2018-8244 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-8244?: CVE-2018-8244 primarily affects Microsoft Office. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-8244?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-8244 published?: CVE-2018-8244 was published on 2018-06-14 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:a:microsoft:office:2016:*:*:*:click-to-run:*:*:*
cpe:2.3:a:microsoft:outlook:2010:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:outlook:2013:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:outlook:2016:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:outlook_rt:2013:sp1:*:*:*:*:*:*

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