CVE-2017-11877

Microsoft Excel 2007 Service Pack 3, Microsoft Excel 2010 Service Pack 2, Microsoft Excel 2013 Service Pack 1, Microsoft Excel 2013 RT Service Pack 1, Microsoft Excel 2016, Microsoft Office Compatibility Pack Service Pack 3, Microsoft Excel Viewer 2007 Service Pack 3, and Microsoft Excel 2016 for Mac allow a security feature bypass by not enforcing macro settings on an Excel document, aka "Microsoft Excel Security Feature Bypass Vulnerability".

Published: 2017-11-15 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-11877 is rated Moderate Risk (48.6/100): CVSS Medium severity, with high exploitation likelihood (EPSS 4.55%, 90th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2017-11877

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 11.99% 4.55% -7.45%
2 2025-12-17 11.88% 11.99% +0.11%
3 2025-11-03 — 11.88% —

Full EPSS history (18 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-11877

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 1.8 3.6 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2017-11877

Affected software / configurations for CVE-2017-11877

Vendor Product Version Raw CPE
microsoft excel 2007 cpe:2.3:a:microsoft:excel:2007:*:*:*:*:*:*:*
microsoft excel 2010 cpe:2.3:a:microsoft:excel:2010:*:*:*:*:*:*:*
microsoft excel 2013 cpe:2.3:a:microsoft:excel:2013:*:*:*:*:*:*:*
microsoft excel 2013 cpe:2.3:a:microsoft:excel:2013:sp1:*:*:*:*:*:*
microsoft excel 2016 cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:*:*
microsoft excel 2016 cpe:2.3:a:microsoft:excel:2016:*:*:*:*:mac_os_x:*:*
microsoft excel_viewer 2007 cpe:2.3:a:microsoft:excel_viewer:2007:sp3:*:*:*:*:*:*
microsoft office_compatibility_pack — cpe:2.3:a:microsoft:office_compatibility_pack:-:sp3:*:*:*:*:*:*

References for CVE-2017-11877

URL Tags
http://www.securityfocus.com/bid/101747 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1039783 Third Party Advisory VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11877 Issue Tracking Patch Vendor Advisory
cvelogic Threat Intelligence