CVE-2026-15105
davenardella snap7 ReadVar Request s7_server.cpp PerformFunctionRead deserialization
Vexday Risk Score
33Attention
SSVC decision (CISA)
Attend
PoC available → attend closely
Exploit maturity
Proof of concept
Public proof of concept exists, but not yet automated.
CVSS 5.3EPSS 0.3%KEV nãoPoC públicaNuclei —Metasploit —Patch —
Lifecycle
08 Jul 2026Published on NVD
Recommendation: Plan a near-term fix — a public PoC already exists.
A flaw has been found in davenardella snap7 up to 1.4.3. This affects the function TS7Worker::PerformFunctionRead of the file src/core/s7_server.cpp of the component ReadVar Request Handler. This manipulation causes deserialization. The attack requires access to the local network. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
Affected products
davenardella · snap7public PoCs found — 1
cve_referencegithub.com/user-attachments/files/28681740/poc.zipunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.