HIGHCVSS v3.1 7.4Vulnerability
CVE-2026-111280
snap7 through 1.4.3 contains an out-of-bounds write vulnerability in TSnap7MicroClient::opReadArea() that allows malicious S7 peers to overflow client buffers via an unchecked DataLength field. Rogue or impersonated PLCs can return crafted ReadVar responses causing memcpy of up to 65535 bytes into caller buffers, crashing SCADA, HMI, or gateway processes and corrupting memory.
Properties
- Severity
- HIGH
- Nvd fetched at
- 2026-10-20T21:14:08.448323+00:00
- Epss score
- 0.00425
- Cvss severity
- HIGH
- Cvss score
- 7.4
- Retrieved at
- 2026-10-21T01:24:48+00:00
- Last source
- FIRST EPSS
- Score
- 7.4
- Cvss version
- 3.1
- Cve id
- CVE-2026-111280
- Cvss vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
- First seen by Signal
- 2026-10-18T13:39:03+00:00
- Vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
- Published at
- 2026-10-15T22:19:29.317
- Last modified
- 2026-10-16T18:25:45.343
- Epss percentile
- 0.35477
Related Entities (1)
HAS_WEAKNESS (1)
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