CVE-2017-16679

URL redirection vulnerability in SAP's Startup Service, SAP KERNEL 32 NUC, SAP KERNEL 32 Unicode, SAP KERNEL 64 NUC, SAP KERNEL 64 Unicode 7.21, 7.21EXT, 7.22 and 7.22EXT; SAP KERNEL 7.21, 7.22, 7.45, 7.49 and 7.52, that allows an attacker to redirect users to a malicious site.

Published: 2017-12-12 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-16679 is rated Moderate Risk (43.8/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.87%). Review affected assets and schedule 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-2017-16679

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 0.30% 0.87% +0.57%
2 2025-07-10 0.17% 0.30% +0.13%
3 2025-03-17 — 0.17% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-16679

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.1 3.0 MEDIUM
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
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:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 2.7 [email protected]
5.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/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:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 4.9 [email protected]

Weakness enumeration for CVE-2017-16679

Affected software / configurations for CVE-2017-16679

Vendor Product Version Raw CPE
sap sap_kernel 7.21 cpe:2.3:o:sap:sap_kernel:7.21:*:*:*:*:*:*:*
sap sap_kernel 7.21ext cpe:2.3:o:sap:sap_kernel:7.21ext:*:*:*:*:*:*:*
sap sap_kernel 7.22 cpe:2.3:o:sap:sap_kernel:7.22:*:*:*:*:*:*:*
sap sap_kernel 7.22ext cpe:2.3:o:sap:sap_kernel:7.22ext:*:*:*:*:*:*:*
sap sap_kernel 7.45 cpe:2.3:o:sap:sap_kernel:7.45:*:*:*:*:*:*:*
sap sap_kernel 7.49 cpe:2.3:o:sap:sap_kernel:7.49:*:*:*:*:*:*:*
sap sap_kernel 7.52 cpe:2.3:o:sap:sap_kernel:7.52:*:*:*:*:*:*:*

References for CVE-2017-16679

URL Tags
http://www.securityfocus.com/bid/102157 Third Party Advisory VDB Entry
https://blogs.sap.com/2017/12/12/sap-security-patch-day-december-2017/ Issue Tracking Vendor Advisory
https://launchpad.support.sap.com/#/notes/2520995 Permissions Required Vendor Advisory
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