How severe is CVE-2017-11776?

CVE-2017-11776 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2017-11776 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-11776?

CVE-2017-11776 affects Microsoft Outlook. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-11776?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2017-11776 published?

CVE-2017-11776 was published on 2017-10-13 and last updated on 2026-06-17.

CVE-2017-11776

CVE-2017-11776 is a high-severity vulnerability in Microsoft Outlook with a CVSS 3.x base score of 7.5. 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-200.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 9% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Microsoft Outlook
Published: 2017-10-13
Last modified: 2026-06-17

Description

Microsoft Outlook 2016 allows an attacker to obtain the email content of a user, due to how Outlook 2016 discloses user email content, aka "Microsoft Outlook Information Disclosure Vulnerability."

Frequently asked questions

What is CVE-2017-11776?: Microsoft Outlook 2016 allows an attacker to obtain the email content of a user, due to how Outlook 2016 discloses user email content, aka "Microsoft Outlook Information Disclosure Vulnerability."
How severe is CVE-2017-11776?: CVE-2017-11776 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2017-11776 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-11776?: CVE-2017-11776 affects Microsoft Outlook. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-11776?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2017-11776 published?: CVE-2017-11776 was published on 2017-10-13 and last updated on 2026-06-17.

References

Affected products (1)

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

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