How severe is CVE-2017-8550?

CVE-2017-8550 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2017-8550 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 22% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-8550?

CVE-2017-8550 affects Microsoft Office. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-8550?

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

When was CVE-2017-8550 published?

CVE-2017-8550 was published on 2017-06-15 and last updated on 2026-06-17.

CVE-2017-8550

CVE-2017-8550 is a medium-severity vulnerability in Microsoft Office with a CVSS 3.x base score of 5.4. Its EPSS exploit-prediction score of 22% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 4.3
EPSS exploit prediction: 22% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Microsoft Office
Published: 2017-06-15
Last modified: 2026-06-17

Description

A remote code execution vulnerability exists in Skype for Business when the software fails to sanitize specially crafted content, aka "Skype for Business Remote Code Execution Vulnerability".

Frequently asked questions

What is CVE-2017-8550?: A remote code execution vulnerability exists in Skype for Business when the software fails to sanitize specially crafted content, aka "Skype for Business Remote Code Execution Vulnerability".
How severe is CVE-2017-8550?: CVE-2017-8550 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2017-8550 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 22% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-8550?: CVE-2017-8550 affects Microsoft Office. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-8550?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-8550 published?: CVE-2017-8550 was published on 2017-06-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:microsoft:office:2016:*:*:*:click-to-run:*:*:*

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