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CVE-2026-63559— o6 Automation open62541 Integer Overflow or Wraparound

CVSS 7.5 · High EPSS 0.43% · P36

Possible ATT&CK Techniques 1AI

T1213 · Data from Information Repositories

Affected Version Matrix 4

VendorProductVersion RangeStatus
o6 Automationopen625411.3.0≤ 1.3.17affected
1.4.0≤ 1.4.16affected
1.5.0≤ 1.5.4affected
masteraffected
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I. Basic Information for CVE-2026-63559

Vulnerability Information
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Vulnerability Title
o6 Automation open62541 Integer Overflow or Wraparound
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
o6 Automation open62541 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
o6 Automation open62541是德国o6 Automation公司开源的一个实现工业控制通信协议的软件组件。 o6 Automation open62541 1.3.17及之前的1.3.x版本、1.4.16及之前的1.4.x版本、1.5.4及之前的1.5.x版本存在数字错误漏洞，该漏洞源于UA_Variant arrayDimensions乘积计算中存在整数溢出，可能导致远程攻击者越界读取堆内存，泄露敏感信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
o6 Automationopen62541 1.3.0 ~ 1.3.17 -

II. Public POCs for CVE-2026-63559

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 12234 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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III. Intelligence Information for CVE-2026-63559

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Patches & Fixes for CVE-2026-63559 (4)

Vendor Advisories for CVE-2026-63559 (2)

Other References for CVE-2026-63559 (1)

Same Patch Batch · o6 Automation · 2026-07-30 · 4 CVEs total

CVE-2026-654238.8 HIGHo6 Automation open62541 Integer Overflow or Wraparound
CVE-2026-630358.1 HIGHo6 Automation open62541 Use After Free
CVE-2026-633625.9 MEDIUMo6 Automation open62541 Integer Underflow

IV. Related Vulnerabilities

Same product: open62541
Same vendor: o6 Automation
Same weakness: CWE-190

V. Comments for CVE-2026-63559

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