MZ Automation libiec61850 up to 1.6.1 MMS Protocol Workflow iec61850_common.c MmsMapping_varAccessSpecToObjectReference GetNamedVariableListAttributesResponse.itemId heap-based overflow

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.8$0-$5k1.26

Summaryinfo

A vulnerability was found in MZ Automation libiec61850 up to 1.6.1. It has been rated as critical. The impacted element is the function MmsMapping_varAccessSpecToObjectReference of the file src/iec61850/common/iec61850_common.c of the component MMS Protocol Workflow. Performing a manipulation of the argument GetNamedVariableListAttributesResponse.itemId results in heap-based overflow. This vulnerability is cataloged as CVE-2026-19259. The attack must be initiated from a local position. Furthermore, there is an exploit available. The project was informed of the problem early through an issue report but has not responded yet.

Detailsinfo

A vulnerability classified as critical has been found in MZ Automation libiec61850 up to 1.6.1. This affects the function MmsMapping_varAccessSpecToObjectReference of the file src/iec61850/common/iec61850_common.c of the component MMS Protocol Workflow. The manipulation of the argument GetNamedVariableListAttributesResponse.itemId with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability.

The weakness was shared by Chuan Wei (CarnegieMe) as 599 as not defined issue. The advisory is shared at github.com. The public release happened without involvement of MZ Automation. This vulnerability is uniquely identified as CVE-2026-19259. The exploitability is told to be easy. An attack has to be approached locally. Technical details and a public exploit are known.

A public exploit has been developed by Chuan Wei (CarnegieMe) in ANSI C. The exploit is shared for download at github.com. It is declared as proof-of-concept. The project was informed of the problem early through an issue report but has not responded yet.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Author: Chuan Wei (CarnegieMe)
Programming Language: 🔒
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

08/07/2026 Advisory disclosed
08/07/2026 +0 days VulDB entry created
08/07/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: 599
Researcher: Chuan Wei (CarnegieMe)
Status: Not defined

CVE: CVE-2026-19259 (🔒)
GCVE (CVE): GCVE-0-2026-19259
GCVE (VulDB): GCVE-100-387009
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/07/2026 16:01
Updated: 08/07/2026 16:09
Changes: 08/07/2026 16:01 (61), 08/07/2026 16:09 (12)
Complete: 🔍
Submitter: SCU_1CP
Committer: SCU_1CP
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #865176: MZ Automation libiec61850 1.6.1 Memory Corruption (Out-of-bounds Read) (by SCU_1CP)

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you need the next level of professionalism?

Upgrade your account now!