CVE-2026-1636
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedA potential DLL hijacking vulnerability was reported in Lenovo Service Bridge that, under certain conditions, could allow a local authenticated user to execute code with elevated privileges.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceLenovo Service Bridge contains a DLL hijacking vulnerability where the application loads dynamic link libraries from insecure locations or without proper path validation. A local authenticated attacker can place a malicious DLL in a location from which the application loads libraries, achieving code execution with elevated privileges.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Local
- Complexity
- High
- Privileges
- Low
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Check if Lenovo Service Bridge is installedOpen Programs and Features (appwiz.cpl) or check common installation paths such as C:\Program Files\Lenovo\Service Bridge or C:\Program Files (x86)\Lenovo\Service Bridge for the presence of the Lenovo Service Bridge application folder.Affected if The application is installed on the system.
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Identify installed Lenovo Service Bridge versionRight-click the Lenovo Service Bridge executable (typically ServiceBridge.exe) in the installation folder, select Properties, and view the File Version on the Details tab. Alternatively, run 'wmic product get name,version' or check the uninstall registry key at HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall for Lenovo Service Bridge entries.Affected if The installed version matches the affected version range for this vulnerability.
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Verify application runs with elevated privilegesOpen Task Manager, locate the ServiceBridge.exe process, right-click and select 'Run as administrator' was used, or check if the process shows 'Running as administrator' in the Details tab. Also examine if the application has UAC elevation prompts or runs from a protected system directory.Affected if The application executes with elevated or administrative privileges.
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Inspect DLL search path for insecure locationsUse Process Monitor (procmon.exe) from Sysinternals to filter by Process Name ServiceBridge.exe and observe the 'Load Image' operations. Look for DLL loads from user-writable directories such as the application directory, TEMP folders, or directories with weak ACLs allowing authenticated users to write files.Affected if The application loads DLLs from directories writable by low-privilege users or does not use fully qualified paths for DLL loading.
A user is affected if Lenovo Service Bridge is installed and the application loads DLLs from insecure or user-writable locations while running with elevated privileges, allowing a local authenticated attacker to place a malicious DLL for code execution.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataImplement secure DLL loading by specifying full paths to DLLs, using safe DLL search mode settings, and validating DLL signatures before loading. Remove world-writable directories from the DLL search path.
- Consultation3.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,800.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-1636 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-1636 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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