Loading vulnerability…
CVE-2025-4423 is a high-impact vulnerability in Lenovo firmware code affecting the SetupAutomationSmm System Management Mode (SMM) module on certain Lenovo systems using Insyde-based UEFI firmware. The issue is described as allowing an attacker to write arbitrary code in the SMM module, leading to memory corruption. Available supporting content characterizes the weakness as a buffer-handling flaw mapped to CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer). Successful exploitation can corrupt SMM memory and impact firmware-resident functionality below the operating system.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability in the SetupAutomationSmm SMM module that allows arbitrary code writing and memory corruption in Lenovo-developed code.
A buffer overflow vulnerability in the System Management Mode (SMM) firmware of certain Lenovo all-in-one desktops using Insyde-based firmware. It can enable SMM memory corruption, modification of UEFI variables, and deep persistence below the operating system.
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.