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Vulnerability Details :

CVE-2026-11826

Summary
Assigner-VulnCheck
Assigner Org ID-83251b91-4cc7-4094-a5c7-464a1b83ea10
Published At-18 Jul, 2026 | 13:35
Updated At-18 Jul, 2026 | 13:35
Rejected At-
Credits

OpenPLC_v3 Heap-Based Buffer Overflow in Modbus Master getData()

OpenPLC_v3 contains a heap-based buffer overflow in the getData() function in webserver/core/modbus_master.cpp. getData() reads characters between two delimiters into a caller-supplied buffer with no size parameter and no bounds check. In parseConfig() the function is invoked with the 100-byte heap-allocated MB_device.dev_name field. An authenticated attacker with access to the OpenPLC web interface can send a crafted HTTP POST to the /modbus endpoint with an oversized device_name value; the value is persisted to mbconfig.cfg and parsed on load, overflowing dev_name and overwriting adjacent struct fields (protocol at offset 108, dev_address at offset 109, ip_port at offset 210). A 200-byte payload writes 100 bytes past the allocation. The result is heap corruption leading to runtime crash and denial of service of the PLC process control loop, with attacker-controlled overwrite of adjacent configuration fields. The upstream repository was archived on 2026-04-04 and no fix is expected; the vendor has confirmed the issue does not affect OpenPLC Runtime v4.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
â–¼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:VulnCheck
Assigner Org ID:83251b91-4cc7-4094-a5c7-464a1b83ea10
Published At:18 Jul, 2026 | 13:35
Updated At:18 Jul, 2026 | 13:35
Rejected At:
â–¼CVE Numbering Authority (CNA)
OpenPLC_v3 Heap-Based Buffer Overflow in Modbus Master getData()

OpenPLC_v3 contains a heap-based buffer overflow in the getData() function in webserver/core/modbus_master.cpp. getData() reads characters between two delimiters into a caller-supplied buffer with no size parameter and no bounds check. In parseConfig() the function is invoked with the 100-byte heap-allocated MB_device.dev_name field. An authenticated attacker with access to the OpenPLC web interface can send a crafted HTTP POST to the /modbus endpoint with an oversized device_name value; the value is persisted to mbconfig.cfg and parsed on load, overflowing dev_name and overwriting adjacent struct fields (protocol at offset 108, dev_address at offset 109, ip_port at offset 210). A 200-byte payload writes 100 bytes past the allocation. The result is heap corruption leading to runtime crash and denial of service of the PLC process control loop, with attacker-controlled overwrite of adjacent configuration fields. The upstream repository was archived on 2026-04-04 and no fix is expected; the vendor has confirmed the issue does not affect OpenPLC Runtime v4.

Affected Products
Vendor
openplcproject
Product
OpenPLC_v3
Default Status
affected
Versions
Affected
  • From 0 through b470206 (git)
Problem Types
TypeCWE IDDescription
CWECWE-122Heap-based Buffer Overflow
Type: CWE
CWE ID: CWE-122
Description: Heap-based Buffer Overflow
Metrics
VersionBase scoreBase severityVector
4.08.7HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
3.18.8HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Version: 4.0
Base score: 8.7
Base severity: HIGH
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Version: 3.1
Base score: 8.8
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

finder
Shuhratbek Uraimov
reporter
Shuhratbek Uraimov
Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://gist.github.com/Shukhrat-03/5cf1825b72e485ef98a32958dfbc611a#security-vulnerability-report
technical-description
https://github.com/thiagoralves/OpenPLC_v3/commit/b4702061dc14d1024856f71b4543298d77007b88
issue-tracking
https://github.com/thiagoralves/OpenPLC_v3
product
https://www.vulncheck.com/advisories/openplc-v3-heap-based-buffer-overflow-in-modbus-master-getdata
third-party-advisory
Hyperlink: https://gist.github.com/Shukhrat-03/5cf1825b72e485ef98a32958dfbc611a#security-vulnerability-report
Resource:
technical-description
Hyperlink: https://github.com/thiagoralves/OpenPLC_v3/commit/b4702061dc14d1024856f71b4543298d77007b88
Resource:
issue-tracking
Hyperlink: https://github.com/thiagoralves/OpenPLC_v3
Resource:
product
Hyperlink: https://www.vulncheck.com/advisories/openplc-v3-heap-based-buffer-overflow-in-modbus-master-getdata
Resource:
third-party-advisory
Information is not available yet
â–¼National Vulnerability Database (NVD)
nvd.nist.gov
Source:disclosure@vulncheck.com
Published At:18 Jul, 2026 | 14:17
Updated At:18 Jul, 2026 | 14:17

OpenPLC_v3 contains a heap-based buffer overflow in the getData() function in webserver/core/modbus_master.cpp. getData() reads characters between two delimiters into a caller-supplied buffer with no size parameter and no bounds check. In parseConfig() the function is invoked with the 100-byte heap-allocated MB_device.dev_name field. An authenticated attacker with access to the OpenPLC web interface can send a crafted HTTP POST to the /modbus endpoint with an oversized device_name value; the value is persisted to mbconfig.cfg and parsed on load, overflowing dev_name and overwriting adjacent struct fields (protocol at offset 108, dev_address at offset 109, ip_port at offset 210). A 200-byte payload writes 100 bytes past the allocation. The result is heap corruption leading to runtime crash and denial of service of the PLC process control loop, with attacker-controlled overwrite of adjacent configuration fields. The upstream repository was archived on 2026-04-04 and no fix is expected; the vendor has confirmed the issue does not affect OpenPLC Runtime v4.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.08.7HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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:X
Primary3.18.8HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Type: Secondary
Version: 4.0
Base score: 8.7
Base severity: HIGH
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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:X
Type: Primary
Version: 3.1
Base score: 8.8
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CPE Matches

Weaknesses
CWE IDTypeSource
CWE-122Primarydisclosure@vulncheck.com
CWE ID: CWE-122
Type: Primary
Source: disclosure@vulncheck.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://gist.github.com/Shukhrat-03/5cf1825b72e485ef98a32958dfbc611a#security-vulnerability-reportdisclosure@vulncheck.com
N/A
https://github.com/thiagoralves/OpenPLC_v3disclosure@vulncheck.com
N/A
https://github.com/thiagoralves/OpenPLC_v3/commit/b4702061dc14d1024856f71b4543298d77007b88disclosure@vulncheck.com
N/A
https://www.vulncheck.com/advisories/openplc-v3-heap-based-buffer-overflow-in-modbus-master-getdatadisclosure@vulncheck.com
N/A
Hyperlink: https://gist.github.com/Shukhrat-03/5cf1825b72e485ef98a32958dfbc611a#security-vulnerability-report
Source: disclosure@vulncheck.com
Resource: N/A
Hyperlink: https://github.com/thiagoralves/OpenPLC_v3
Source: disclosure@vulncheck.com
Resource: N/A
Hyperlink: https://github.com/thiagoralves/OpenPLC_v3/commit/b4702061dc14d1024856f71b4543298d77007b88
Source: disclosure@vulncheck.com
Resource: N/A
Hyperlink: https://www.vulncheck.com/advisories/openplc-v3-heap-based-buffer-overflow-in-modbus-master-getdata
Source: disclosure@vulncheck.com
Resource: N/A

Change History

0
Information is not available yet

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||
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Integer Overflow to Buffer Overflow
CVE-2026-0132
Matching Score-4
Assigner-Google Devices
ShareView Details
Matching Score-4
Assigner-Google Devices
CVSS Score-8.8||HIGH
EPSS-0.29% / 20.51%
||
7 Day CHG~0.00%
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Action-Not Available
Vendor-Google LLC
Product-Android
CWE ID-CWE-122
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CVE-2021-43304
Matching Score-4
Assigner-JFrog
ShareView Details
Matching Score-4
Assigner-JFrog
CVSS Score-8.8||HIGH
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||
7 Day CHG~0.00%
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KEV Added-Not Available
KEV Action Due Date-Not Available

Heap buffer overflow in Clickhouse's LZ4 compression codec when parsing a malicious query. There is no verification that the copy operations in the LZ4::decompressImpl loop and especially the arbitrary copy operation wildCopy<copy_amount>(op, ip, copy_end), don’t exceed the destination buffer’s limits.

Action-Not Available
Vendor-yandexyandexDebian GNU/Linux
Product-clickhousedebian_linuxclickhouse
CWE ID-CWE-122
Heap-based Buffer Overflow
CWE ID-CWE-787
Out-of-bounds Write
CVE-2025-4355
Matching Score-4
Assigner-VulDB
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Matching Score-4
Assigner-VulDB
CVSS Score-8.7||HIGH
EPSS-0.99% / 58.62%
||
7 Day CHG~0.00%
Published-06 May, 2025 | 12:31
Updated-13 May, 2025 | 20:24
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Tenda DAP-1520 api set_ws_action heap-based overflow

A vulnerability was found in Tenda DAP-1520 1.10B04_BETA02. It has been classified as critical. This affects the function set_ws_action of the file /dws/api/. The manipulation leads to heap-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

Action-Not Available
Vendor-Tenda Technology Co., Ltd.D-Link Corporation
Product-dap-1520_firmwaredap-1520DAP-1520
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE ID-CWE-122
Heap-based Buffer Overflow
CWE ID-CWE-787
Out-of-bounds Write
CVE-2024-29161
Matching Score-4
Assigner-MITRE Corporation
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Matching Score-4
Assigner-MITRE Corporation
CVSS Score-8.8||HIGH
EPSS-0.86% / 54.42%
||
7 Day CHG~0.00%
Published-09 May, 2024 | 16:24
Updated-18 Apr, 2025 | 14:30
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

HDF5 through 1.14.3 contains a heap buffer overflow in H5A__attr_release_table, resulting in the corruption of the instruction pointer and causing denial of service or potential code execution.

Action-Not Available
Vendor-n/aThe HDF Group
Product-hdf5n/ahdf5
CWE ID-CWE-122
Heap-based Buffer Overflow
CVE-2024-33873
Matching Score-4
Assigner-MITRE Corporation
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Matching Score-4
Assigner-MITRE Corporation
CVSS Score-8.8||HIGH
EPSS-0.92% / 56.26%
||
7 Day CHG~0.00%
Published-09 May, 2024 | 16:46
Updated-18 Apr, 2025 | 14:35
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

HDF5 Library through 1.14.3 has a heap-based buffer overflow in H5D__scatter_mem in H5Dscatgath.c.

Action-Not Available
Vendor-n/aThe HDF Group
Product-hdf5n/ahdf5
CWE ID-CWE-122
Heap-based Buffer Overflow
CVE-2024-33877
Matching Score-4
Assigner-MITRE Corporation
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Matching Score-4
Assigner-MITRE Corporation
CVSS Score-8.8||HIGH
EPSS-0.92% / 56.26%
||
7 Day CHG~0.00%
Published-09 May, 2024 | 16:48
Updated-18 Apr, 2025 | 14:35
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

HDF5 Library through 1.14.3 has a heap-based buffer overflow in H5T__conv_struct_opt in H5Tconv.c.

Action-Not Available
Vendor-n/aThe HDF Group
Product-hdf5n/ahdf5
CWE ID-CWE-122
Heap-based Buffer Overflow
CVE-2024-32623
Matching Score-4
Assigner-MITRE Corporation
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Matching Score-4
Assigner-MITRE Corporation
CVSS Score-8.8||HIGH
EPSS-0.91% / 56.03%
||
7 Day CHG~0.00%
Published-09 May, 2024 | 16:45
Updated-18 Apr, 2025 | 14:35
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

HDF5 Library through 1.14.3 contains a heap-based buffer overflow in H5VM_array_fill in H5VM.c (called from H5S_select_elements in H5Spoint.c).

Action-Not Available
Vendor-n/aThe HDF Group
Product-hdf5n/ahdf5
CWE ID-CWE-122
Heap-based Buffer Overflow
CVE-2023-50364
Matching Score-4
Assigner-QNAP Systems, Inc.
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Matching Score-4
Assigner-QNAP Systems, Inc.
CVSS Score-6.4||MEDIUM
EPSS-0.85% / 54.08%
||
7 Day CHG~0.00%
Published-26 Apr, 2024 | 15:01
Updated-11 Sep, 2024 | 13:27
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
QTS, QuTS hero

A buffer copy without checking size of input vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow authenticated users to execute code via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.6.2722 build 20240402 and later QuTS hero h5.1.6.2734 build 20240414 and later

Action-Not Available
Vendor-QNAP Systems, Inc.
Product-quts_heroqtsQuTS heroQTSquts_heroqts
CWE ID-CWE-122
Heap-based Buffer Overflow
CWE ID-CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CVE-2023-36824
Matching Score-4
Assigner-GitHub, Inc.
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Matching Score-4
Assigner-GitHub, Inc.
CVSS Score-7.4||HIGH
EPSS-77.42% / 99.51%
||
7 Day CHG-3.50%
Published-11 Jul, 2023 | 16:16
Updated-10 Apr, 2025 | 20:54
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Heap overflow in COMMAND GETKEYS and ACL evaluation in Redis

Redis is an in-memory database that persists on disk. In Redit 7.0 prior to 7.0.12, extracting key names from a command and a list of arguments may, in some cases, trigger a heap overflow and result in reading random heap memory, heap corruption and potentially remote code execution. Several scenarios that may lead to authenticated users executing a specially crafted `COMMAND GETKEYS` or `COMMAND GETKEYSANDFLAGS`and authenticated users who were set with ACL rules that match key names, executing a specially crafted command that refers to a variadic list of key names. The vulnerability is patched in Redis 7.0.12.

Action-Not Available
Vendor-Fedora ProjectRedis Inc.
Product-fedoraredisredisredis
CWE ID-CWE-122
Heap-based Buffer Overflow
CWE ID-CWE-131
Incorrect Calculation of Buffer Size
CWE ID-CWE-787
Out-of-bounds Write
CVE-2025-32318
Matching Score-4
Assigner-Android (associated with Google Inc. or Open Handset Alliance)
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Matching Score-4
Assigner-Android (associated with Google Inc. or Open Handset Alliance)
CVSS Score-8.8||HIGH
EPSS-0.28% / 19.81%
||
7 Day CHG~0.00%
Published-05 Sep, 2025 | 16:10
Updated-26 Feb, 2026 | 17:49
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

In Skia, there is a possible out of bounds write due to a heap buffer overflow. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

Action-Not Available
Vendor-Google LLC
Product-androidAndroid
CWE ID-CWE-122
Heap-based Buffer Overflow
CVE-2024-26191
Matching Score-4
Assigner-Microsoft Corporation
ShareView Details
Matching Score-4
Assigner-Microsoft Corporation
CVSS Score-8.8||HIGH
EPSS-1.62% / 73.41%
||
7 Day CHG~0.00%
Published-10 Sep, 2024 | 16:53
Updated-31 Dec, 2024 | 23:02
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Microsoft SQL Server Native Scoring Remote Code Execution Vulnerability

Microsoft SQL Server Native Scoring Remote Code Execution Vulnerability

Action-Not Available
Vendor-Microsoft Corporation
Product-sql_server_2019sql_server_2022sql_2016_azure_connect_feature_packsql_server_2017sql_server_2016Microsoft SQL Server 2022 for (CU 14)Microsoft SQL Server 2019 (GDR)Microsoft SQL Server 2017 (GDR)Microsoft SQL Server 2017 (CU 31)Microsoft SQL Server 2019 (CU 28)Microsoft SQL Server 2022 (GDR)
CWE ID-CWE-122
Heap-based Buffer Overflow
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