Vulnerability · Published Jul 30, 2026 · Assigned by icscert
CVE-2026-63033MZ Automation lib60870 Out-of-bounds Read
Medium 6.5
In plain English
A medium-severity out-of-bounds read in lib60870 from MZ Automation. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.5%top 60.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A crafted IEC 60870-5-104 I-frame with a declared object count exceeding what fits in the ASDU body causes InformationObject_ParseObjectAddress to read one byte past the end of the heap-allocated message buffer.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:26.04:LTS | lib60870 | no fix listed | UBUNTU-CVE-2026-63033 |
| Ubuntu:26.10 | lib60870 | no fix listed | UBUNTU-CVE-2026-63033 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| MZ Automation | lib60870 | 2.4.0 |
Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L