CVE-2026-63550
MZ Automation libiec61850 Out-of-bounds Read
- State
- Published
- Severity
- 7.1 High
- Published
- Jul 30, 2026
- Updated
- Jul 31, 2026
- Reserved
- Jul 27, 2026
Description
The MMS BER decoder contains a boundary-handling flaw in the processing of certain fields within confirmed-request messages. When a crafted BER-encoded element is received over an established MMS session (TCP port 102), the decoder may advance its internal read position incorrectly, leading to a heap out-of-bounds read. This condition causes the MMS handling process to terminate unexpectedly, resulting in a denial-of-service.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.1 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | icscert |
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | icscert |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
libiec61850MZ Automation GmbH |
|
References
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