CVE-2026-66767CWE-191

CVE-2026-66767

High · published September 8, 2026

CVSS v3.1
7.7
EPSS
0%
Percentile
35.9
In the wild
Unconfirmed
What it is

SAP NetWeaver Application Server for ABAP and ABAP Platform allows an unauthenticated user to send a specially crafted packet that triggers reprocessing of a previously buffered user request, potentially hijacking another user's session under narrow timing conditions. Successful exploitation could result in high impact on confidentiality and integrity, with low impact on availability of the application.

The record
Technical detail
CVSS v3.1
7.7 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
CVSS v4.0
Not supplied
EPSS
0.00427 · 35.9th percentile
Weakness
CWE-191 · Integer Underflow (Wrap or Wraparound)
Published
2026-09-08T05:17Z
References (2)
https://me.sap.com/notes/3757002 · [email protected]https://url.sap/sapsecuritypatchday · [email protected]
EPSS history
Timeline
  • 09 SEP 03:20Z
    EPSS moved — → 0%
    epss
  • 08 SEP 00:11Z
    Memory Corruption vulnerability in SAP NetWeaver Application Server for ABAP and ABAP Platform
    cvelistv5