How severe is CVE-2017-8545?

CVE-2017-8545 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-2017-8545 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-2017-8545?

CVE-2017-8545 affects Microsoft Outlook. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-8545?

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

When was CVE-2017-8545 published?

CVE-2017-8545 was published on 2017-06-15 and last updated on 2026-06-17.

CVE-2017-8545

CVE-2017-8545 is a medium-severity vulnerability in Microsoft Outlook 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 Outlook
Published: 2017-06-15
Last modified: 2026-06-17

Description

A spoofing vulnerability exists in when Microsoft Outlook for Mac does not sanitize html properly, aka "Microsoft Outlook for Mac Spoofing Vulnerability".

Frequently asked questions

What is CVE-2017-8545?: A spoofing vulnerability exists in when Microsoft Outlook for Mac does not sanitize html properly, aka "Microsoft Outlook for Mac Spoofing Vulnerability".
How severe is CVE-2017-8545?: CVE-2017-8545 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-2017-8545 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-2017-8545?: CVE-2017-8545 affects Microsoft Outlook. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-8545?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-8545 published?: CVE-2017-8545 was published on 2017-06-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:microsoft:outlook:2016:*:*:*:*:macos:*:*

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