CVE-2017-16689

A Trusted RFC connection in SAP KERNEL 32NUC, SAP KERNEL 32Unicode, SAP KERNEL 64NUC, SAP KERNEL 64Unicode 7.21, 7.21EXT, 7.22, 7.22EXT; SAP KERNEL from 7.21 to 7.22, 7.45, 7.49, can be established to a different client or a different user on the same system, although no explicit Trusted/Trusting Relation to the same system has been defined.

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-2017-16689 is rated Moderate Risk (58.3/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.19%). 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-2017-16689

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 0.35% 1.19% +0.84%
2 2025-03-30 0.64% 0.35% -0.29%
3 2025-03-29 — 0.64% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-16689

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H 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:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]
6.5 2.0 MEDIUM
AV:N/AC:L/Au:S/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.0 6.4 [email protected]

Weakness enumeration for CVE-2017-16689

Affected software / configurations for CVE-2017-16689

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

References for CVE-2017-16689

URL Tags
http://www.securityfocus.com/bid/102144 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/2449757 Permissions Required Vendor Advisory
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