Lenovo System Update: Deserialization of untrusted data allows local privilege escalation
Summary
Lenovo System Update contains a deserialization of untrusted data vulnerability (CWE-502). A local user with valid credentials can exploit it to execute code with elevated privileges. The attack is not possible remotely and requires local access to the affected system. Lenovo has announced end of support for System Update as of October 31, 2026, so no fixed version is expected.
Affected
- Lenovo System Update up to and including 5.08.03.59 (per third-party sources; exact range to be confirmed with Lenovo advisory LEN-232748)
Fixed in
- Unknown. No fixed version has been published, and Lenovo has ended support for System Update as of October 31, 2026.
Workaround
- Unknown. Lenovo has not published a workaround.
Exploitation
- No known exploitation in the wild at the time of publication.
- No public exploit available as of publication according to VulDB.
Our recommendation
- Check whether Lenovo System Update is installed on endpoints and servers, especially on multi-user systems.
- Uninstall Lenovo System Update and migrate to Lenovo Commercial Vantage, as recommended by Lenovo.
- Until removal, restrict local standard-user access on affected machines.
- Monitor the Lenovo advisory LEN-232748 and CISA KEV for changes.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Lenovo product page support.lenovo.com
- Lenovo advisory LEN-232748 support.lenovo.com
- VulDB vuldb.com
- OffSeq radar.offseq.com
- CVE record mirror cve.threatint.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 11 Nov 2026, 18:21.
Original description (NVD)
A deserialization of untrusted data vulnerability was discovered in Lenovo System Update that could allow a local authenticated user to execute code with elevated privileges.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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