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CVE-2025-40577 is an out-of-bounds read in the PROFINET Discovery and basic Configuration Protocol (DCP) packet handling of Siemens SCALANCE LPE9403 devices. The DCP process does not properly validate incoming PROFINET packets, allowing a specially crafted Layer 2 packet to trigger a process crash. Affected products are SCALANCE LPE9403 model 6GK5998-3GS00-2AC2 running firmware earlier than V4.0 HF0.
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What an attacker gets, and what they’ve been doing with it.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Out-of-bounds read flaw (CWE-125) in Siemens SCALANCE LPE9403 firmware before V4.0 HF0.
An out-of-bounds-read vulnerability in the PROFINET DCP service (dcpd.bin) of Siemens SCALANCE LPE9403 firmware through V4.0 HF0. A remote unauthenticated attacker on the same Layer-2 segment can use specially crafted Ethernet packets to crash the daemon, disrupting discovery and device-information functions.
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.