Quick answers
- Is CVE-2026-49035 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-49035 being exploited in the wild.
- How severe is CVE-2026-49035?
- High severity, with a CVSS score of 8.1, published 23 July 2026.
- Which products and versions are affected?
- MZ Automation libIEC61850 v1.0.0 to v1.6.1.
- Is there a fix for CVE-2026-49035?
- A patch was published on 2026-07-23: Vendor fix recommended via latest build update Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-49035 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-49035?
- Check whether you run MZ Automation libIEC61850 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A heap-based buffer overflow (CWE-122) exists in MZ Automation libIEC61850 versions v1.0.0 through v1.6.1. The vulnerability is triggered when the library processes a specially crafted Manufacturing Message Specification (MMS) Initiate request. An unauthenticated remote attacker can exploit this to cause memory corruption. While Address Space Layout Randomization (ASLR) may mitigate the impact to a denial of service (DoS), remote code execution (RCE) has been demonstrated in environments where ASLR is disabled. Users are advised to update to the latest build available on the vendor's GitHub repository.
Affected products
- MZ Automation libIEC61850 v1.0.0 to v1.6.1
Timeline
- 2026-07-23: advisory: Initial publication by CISA and NVD
- 2026-07-23: patched: Vendor fix recommended via latest build update