🛡️ CVE-2026-63559

🟠 CVSS 7.5 — High ✅ No Known Exploit CWE-190 NVD
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

An integer overflow in the UA_Variant arrayDimensions product

computation in open62541 may allow a remote attacker to read

out-of-bounds heap memory, potentially disclosing sensitive information.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

Weakness class

CVE-2026-63559 is classified as CWE-190: Integer Overflow or Wraparound. Arithmetic produces a value too large for its type and wraps around, so a later size or bounds check passes when it should not.

Affected software

CVE-2026-63559 is recorded against 1 package.

  • unknown

Timeline and source

Published on 30 July 2026 and last revised on 31 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com
github.com
github.com
github.com
github.com
www.cisa.gov
www.o6-automation.com

Details

Severity HIGH
CVSS Score 7.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE CWE-190
Public Exploit ✅ No
Source NVD
Published 2026-07-30
Updated 2026-08-11
Modified 2026-07-31
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown — —

Similar Threats

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