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CVE-2016-3378

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."

Severity
High 7.4
Published
14 Sept 2016
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
15% in the next 30 daysHigher than 96% of CVEs. EPSS by FIRST, 11 Nov 2026
Weakness
Improper input validation (CWE-20)
Attack
Over the network · No login needed · Needs someone to click or open something
Attacker can
Change data
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N
Sources
NVD

Affected software

SoftwareAffected versions
Microsoft Exchange ServerServers and applications · cpe:a:microsoft:exchange_server
  • Version 2013-cumulative_update_12
  • Version 2013-cumulative_update_13
  • Version 2013-sp1
  • Version 2016-cumulative_update_1
  • Version 2016-cumulative_update_2

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2016-3378
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2016-3378