Medium severity · published Aug 11, 2026
CVE-2026-66779
Cross-Site Scripting (XSS) vulnerability in SAP NetWeaver Application Server ABAP
6.3
CVSS
0.3%
EPSS
No
On KEV
Description
Due to a Cross-Site Scripting (XSS) vulnerability in SAP NetWeaver Application Server ABAP, an authenticated attacker could generate a malicious link and make it publicly accessible. If an authenticated victim accesses this link, the injected input is processed and reflected within the DOM on the client side during page rendering, resulting in the execution of malicious content in the victim's browser context. Successful exploitation could result in a high impact to the confidentiality and a low impact to the integrity of the system, while availability remains unaffected.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SN
SAP NetWeaver Application Server ABAP · SAP_SE
SAP_UI 754; 755; 756; 757; 758; 816; +3 more · source: vendor
Affected product
SN
SAP NetWeaver Application Server ABAP
SAP_SE
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-66779
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-66779
me.sap.com
https://me.sap.com/notes/3721424
url.sap
https://url.sap/sapsecuritypatchday
More from SAP NetWeaver Application Server ABAP
9.9
CVE-2026-44747
Memory Corruption vulnerability in SAP NetWeaver Application Server ABAP
6.1
CVE-2026-34257
Open Redirect vulnerability in SAP NetWeaver Application Server ABAP
4.3
CVE-2026-27680
CSS Injection vulnerability in SAP NetWeaver Application Server ABAP
