CVE-2026-20977

MEDIUM CVSS 4.0: 6.9 EPSS 0.14%
Updated Feb 04, 2026
Parameter Value
CVSS 6.9 (MEDIUM)
Public PoC No

Improper access control in Emergency Sharing prior to SMR Feb-2026 Release 1 allows local attackers to interrupt its functioning.

Attack Parameters

Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service

CVSS Vector v4.0