Integer Overflow Vulnerability in open62541 Affects Data Integrity
CVE-2026-63559
8.7HIGH
What is CVE-2026-63559?
The open62541 library has a vulnerability involving an integer overflow in the UA_Variant arrayDimensions computation. This flaw could be exploited by a remote attacker to read beyond allocated memory bounds, leading to potential exposure of sensitive information stored in heap memory. Proper input validation and bounds checking are crucial for ensuring data integrity and protecting against unauthorized access.
Affected Version(s)
open62541 Windows 1.3.0 <= 1.3.17
open62541 Windows 1.4.0 <= 1.4.16
open62541 Windows 1.5.0 <= 1.5.4
References
CVSS V4
Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None
Timeline
Vulnerability published
Vulnerability Reserved
Credit
Asher Davila of Palo Alto Networks reported this vulnerability to CISA.