CVE-2016-3378

Name: CVE-2016-3378
Creator: NVD / NIST
Published: 2016-09-14T10:59:52.86+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 15.28%

Last modified Jun 17, 2026

CVE-2016-3378 is a vulnerability of currently unknown severity. Open redirect vulnerability in Microsoft Exchange Server 2013 SP1, 2013 Cumulative Update 12, 2013 Cumulative Update 13, 2016 Cumulative Update 1, and 2016 Cumulative Update 2 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a crafted URL, aka "Microsoft Exchange Open Redirect Vulnerability.". EPSS estimates a 15.28% chance of exploitation in the next 30 days.

Description

Open redirect vulnerability in Microsoft Exchange Server 2013 SP1, 2013 Cumulative Update 12, 2013 Cumulative Update 13, 2016 Cumulative Update 1, and 2016 Cumulative Update 2 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a crafted URL, aka "Microsoft Exchange Open Redirect Vulnerability."

Metrics

EPSS Probability

15.28%

96.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions	Update
Microsoft	Exchange Server	2013	Cumulative Update 12
Microsoft	Exchange Server	2016	Cumulative Update 1

References

Timeline

Published: Sep 14, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-3378?

How severe is CVE-2016-3378?

Severity scoring for CVE-2016-3378 is pending analysis. The EPSS model estimates a 15.28% probability of exploitation in the next 30 days.

How do I fix CVE-2016-3378?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-3378?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST