Buffer Overflow RCE in Siemens LOGO! 8 BM Devices
CVE-2025-40815 is a classic buffer overflow vulnerability affecting Siemens LOGO! and SIPLUS LOGO! 8 BM devices, including the listed LOGO! 12/24RCE, 12/24RCEo, 230RCE, 230RCEo, 24CE, 24CEo, 24RCE, 24RCEo, and corresponding SIPLUS variants, all versions. According to the advisory, the affected devices do not properly validate the structure of TCP packets in several methods. A remote attacker can send crafted TCP packets that trigger a buffer overflow condition, potentially allowing control of the instruction counter and execution of attacker-supplied code on the device.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Recent activity
5 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.