CVE-2026-21018

Out-of-bounds write in SveService prior to SMR May-2026 Release 1 allows local privileged attackers to execute arbitrary code.

CVSS v4.0

6.8 MEDIUMCVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

6.7 MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS

0.15% chance of exploitation in the next 30 days, 5th percentile

Published

2026-05-13

Updated

2026-05-14

Proof-of-concept exploits (2)

• Pealeap/CVE-2026-210181★ · 2026-06-23
• George0Papasotiriou/CVE-2026-21018-OPC-UA-Authentication-Bypass-via-None-Security-Policy0★ · 2026-08-04

References

• CVE Record
• NVD entry

Related

• CVE-2026-21045
• CVE-2026-21048
• CVE-2026-21017
• CVE-2026-21019
• CVE-2026-21016
• CVE-2026-21020