CVE-2026-34257 | Open Redirect vulnerability in SAP NetWeaver Application Server ABAP

Due to an Open Redirect vulnerability in SAP NetWeaver Application Server ABAP, an unauthenticated attacker could craft malicious URL that, if accessed by a victim, they could be redirected to the page controlled by the attacker. This causes low impact on confidentiality and integrity of the application with no impact on availability.

Published: 2026-04-14 Last update: 2026-06-03 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-34257 is rated Low Risk (30.6/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.06%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

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-2026-34257

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 2026-05-16 0.04% 0.06% +0.02%
2 2026-04-14 — 0.04% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-34257

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.1 3.1 MEDIUM
CVSS:3.1/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]

Weakness enumeration for CVE-2026-34257

Affected software / configurations for CVE-2026-34257

Vendor Product Version Raw CPE
sap netweaver_application_server_abap 700 cpe:2.3:a:sap:netweaver_application_server_abap:700:*:*:*:sap_basis:*:*:*
sap netweaver_application_server_abap 701 cpe:2.3:a:sap:netweaver_application_server_abap:701:*:*:*:sap_basis:*:*:*
sap netweaver_application_server_abap 702 cpe:2.3:a:sap:netweaver_application_server_abap:702:*:*:*:sap_basis:*:*:*
sap netweaver_application_server_abap 731 cpe:2.3:a:sap:netweaver_application_server_abap:731:*:*:*:sap_basis:*:*:*
sap netweaver_application_server_abap 740 cpe:2.3:a:sap:netweaver_application_server_abap:740:*:*:*:sap_basis:*:*:*
sap netweaver_application_server_abap 750 cpe:2.3:a:sap:netweaver_application_server_abap:750:*:*:*:sap_basis:*:*:*
sap netweaver_application_server_abap 752 cpe:2.3:a:sap:netweaver_application_server_abap:752:*:*:*:sap_basis:*:*:*
sap netweaver_application_server_abap 753 cpe:2.3:a:sap:netweaver_application_server_abap:753:*:*:*:sap_basis:*:*:*
sap netweaver_application_server_abap 754 cpe:2.3:a:sap:netweaver_application_server_abap:754:*:*:*:sap_basis:*:*:*
sap netweaver_application_server_abap 755 cpe:2.3:a:sap:netweaver_application_server_abap:755:*:*:*:sap_basis:*:*:*
sap netweaver_application_server_abap 756 cpe:2.3:a:sap:netweaver_application_server_abap:756:*:*:*:sap_basis:*:*:*
sap netweaver_application_server_abap 757 cpe:2.3:a:sap:netweaver_application_server_abap:757:*:*:*:sap_basis:*:*:*
sap netweaver_application_server_abap 758 cpe:2.3:a:sap:netweaver_application_server_abap:758:*:*:*:sap_basis:*:*:*
sap netweaver_application_server_abap 816 cpe:2.3:a:sap:netweaver_application_server_abap:816:*:*:*:sap_basis:*:*:*

References for CVE-2026-34257

URL Tags
https://me.sap.com/notes/3692004 Permissions Required
https://url.sap/sapsecuritypatchday Vendor Advisory
cvelogic Threat Intelligence