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CVE-2017-11932

24
FAUCET Score

CVE-2017-11932 is a high-severity spoofing vulnerability affecting Microsoft Exchange Server 2016 CU5, stemming from improper validation of web requests in Outlook Web Access (OWA). With a CVSS score of 8.1, it allows an unauthenticated attacker to achieve high confidentiality and integrity impact through a low-complexity network attack requiring user interaction. While not currently listed on CISA's KEV catalog or having public exploit code, it has garnered some community discussion and media coverage, indicating a degree of awareness.

Impacted Technologies

VendorProductVersion(s)CPE
2016CPE matchmatch criteria
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_6:*:*:*:*:*:*
2016CPE matchmatch criteria
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_7:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.1HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
5.2
CvssVersion
3.0

Exploit Intelligence

EPSS Score
5.88%
Probability of exploitation in next 30 days
EPSS Percentile
92.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0588 is in the 92nd percentile among its peer group of 14,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Microsoft Exchange Server 2016 Cumulative Update 6
View patch
microsoftpatch availablevia msrc
Product: Microsoft Exchange Server 2016 Cumulative Update 7
View patch

Vendor Advisories (1)

microsoft2017-Dec/CVE-2017-11932Important

Microsoft Exchange Spoofing Vulnerability

Dec 12, 2017

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2017-11932
PatchVendor Advisory
securityfocus.com / bid/102060
Third Party AdvisoryVDB Entry
securitytracker.com / id/1039996
Third Party AdvisoryVDB Entry