CVE-2026-21120 WSM service - Use After Free

WSM service prior to SMR Oct-2026 Release 1 contains a use after free vulnerability in WSM service, letting local attackers execute arbitrary code with system privileges, exploit requires local access.

CVSS base score 8.9 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.17% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Use After Free
Impact
Remote Code Execution
CVSS vector
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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
Published
12 October 2026
Updated
15 October 2026
Weakness
CWE-416

Vendor fix

Update to SMR Oct-2026 Release 1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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