CVE-2026-111280 (GCVE-0-2026-111280)

Vulnerability from cvelistv5 – Published: 2026-10-15 21:43 – Updated: 2026-10-15 21:43
VLAI
Title
snap7 through 1.4.3 Out-of-Bounds Write via TSnap7MicroClient::opReadArea
Summary
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.
Severity
8.3 (High)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
7.4 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
CWE
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 6373 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
davenardella snap7 Affected: 0 , ≤ 1.4.3 (custom)
    cpe:2.3:a:snap7_project:snap7:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-08-01 00:00
Credits
Mayur021 Shukhratbek Uraiimov
Show details on NVD website
To clipboard 

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}



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