How severe is CVE-2017-8508?

CVE-2017-8508 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2017-8508 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-8508?

CVE-2017-8508 primarily affects Microsoft Outlook. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-8508?

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

When was CVE-2017-8508 published?

CVE-2017-8508 was published on 2017-06-15 and last updated on 2026-06-17.

CVE-2017-8508

CVE-2017-8508 is a medium-severity vulnerability in Microsoft Outlook with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Outlook
Published: 2017-06-15
Last modified: 2026-06-17

Description

A security feature bypass vulnerability exists in Microsoft Office software when it improperly handles the parsing of file formats, aka "Microsoft Office Security Feature Bypass Vulnerability".

Frequently asked questions

What is CVE-2017-8508?: A security feature bypass vulnerability exists in Microsoft Office software when it improperly handles the parsing of file formats, aka "Microsoft Office Security Feature Bypass Vulnerability".
How severe is CVE-2017-8508?: CVE-2017-8508 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2017-8508 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-8508?: CVE-2017-8508 primarily affects Microsoft Outlook. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-8508?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-8508 published?: CVE-2017-8508 was published on 2017-06-15 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:microsoft:outlook:2007:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:outlook:2010:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:outlook:2013:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:outlook:2016:*:*:*:*:*:*:*

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