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CVE-2026-116014

open62541 1.5.0 before 1.5.7 Integer Overflow Heap Buffer Overflow via Custom DataType

CVSS score

9.2

EPSS probability

—

Risk score

0.9

Published

2 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Official patch verified

Etkilenen ürün ve sürüm için yayımlanan güvenlik güncellemesini uygulayın.

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Vulnerability description

DayBreach AI Explanation

Verified against sources

CVE-2026-116014: open62541 Integer Overflow and Heap Buffer Overflow

Sources read

1

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

open62541 versions 1.5.0 to 1.5.7 contain an integer overflow in UA_DataType_fromStructureDescription(). A malicious OPC UA server can cause a heap buffer overflow, crashing clients or enabling code execution.

Why does it matter?

This vulnerability poses a high risk by allowing remote clients running in critical systems to crash or execute arbitrary code.

What should be done?

  • Follow the vendor advisory for fixes and patches
  • Update the open62541 software
  • Review official commits and pull requests on GitHub
Chain of evidence and sources2 verified claims

open62541 1.5.0 öncesi 1.5.7 sürümleri, UA_DataType_fromStructureDescription() içinde tam sayı taşması barındırır.

S0 · daybreach-canonicalS1 · cvelist

Kötü amaçlı bir OPC UA sunucusu, UA_Client_getRemoteDataTypes() ile veri tipleri sağlayarak decodeBinaryStructure() fonksiyonunun heap belleğini taşmasına neden olabilir.

S0 · daybreach-canonicalS1 · cvelist
Show the technical text from the sources

open62541 1.5.0 before 1.5.7 contains an integer overflow in UA_DataType_fromStructureDescription() that wraps the 16-bit memSize field for large custom structure definitions. A malicious OPC UA server can supply DataType definitions via UA_Client_getRemoteDataTypes(), causing decodeBinaryStructure() to overflow the heap, crashing clients or enabling code execution.

CVSS vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CWE: CWE-190

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-116014 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1open62541open62541 View
Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
9.2CVSS V40CRITICALCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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:XNVD
9.2CVSS V4_0CRITICALCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NCVE CNA
8.1CVSS V31HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HNVD
8.1CVSS V3_1HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HCVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

6 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

cvelist

CNA çözüm referansı

Open source
cvelist

CNA çözüm referansı

Open source
cvelist

CNA çözüm referansı

Open source
reference

Yama veya çözüm referansı

Open source
reference

Yama veya çözüm referansı

Open source
reference

Yama veya çözüm referansı

Open source
Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Apply the official update named in the evidence only to the matching product and version.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-116014 is associated with the following CWEs:

CWE-190: Integer Overflow or Wraparound

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-116014 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsGerekmiyor
UserGerekmiyor

Official Sources and Advisories

https://github.com/open62541/open62541/commit/0cf4806768c493bc6ccffcd4419da24153b970ecpatchhttps://github.com/open62541/open62541/pull/8298patchhttps://github.com/open62541/open62541/pull/8302patchhttps://github.com/open62541/open62541/blob/v1.5.6/src/ua_types_definition.c#L274vendor-advisoryopen62541 v1.5.7 Release Notesvendor-advisoryVulnCheck Advisory: open62541 1.5.0 before 1.5.7 Integer Overflow Heap Buffer Overflow via Custom DataTypevendor-advisory

CVSS Vector Radar Chart

9.2 / 10
Attack VectorNetworkComplexityLowPrivilegesNoneUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityHigh

Vulnerability Scoring Details

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone required
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)High

Yama doğrulandı

6 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

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open62541

Weakness Type (CWE & CAPEC)

CWE-190

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CVE-2026-116014 · open62541 1.5.0 before 1.5.7 Integer…