High severity · published Jul 23, 2026
CVE-2026-49035
Stack-based Buffer Overflow in MZ Automation libIEC61850
8.1
CVSS
0.6%
EPSS
No
On KEV
Description
The affected product is vulnerable to a heap-based buffer overflow via a crafted MMS Initiate request. Remote code execution (RCE) has been demonstrated when ASLR is disabled; memory corruption or denial of service may occur in configurations where ASLR is enabled.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
libIEC61850 · MZ Automation
1.0.0 through 1.6.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-49035
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-49035
www.cisa.gov
https://www.cisa.gov/news-events/ics-advisories/icsa-26-204-06
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