CVE-2026-1636

Local privilege escalation via DLL search hijacking

Published Apr 15, 2026 · Updated Apr 15, 2026

DLL search-path hijacking in Lenovo Service Bridge before 5.0.2.20 allows local users to execute code with elevated privileges. The vendor identifies uncontrolled DLL search-path resolution but does not disclose the affected executable, library name, or load sequence. Exploitation requires an authenticated local user, additional runtime conditions, and passive user interaction; successful loading executes attacker-controlled code with elevated privileges.

CVSS severity5.4
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DLL search-path hijacking in Lenovo Service Bridge before 5.0.2.20 allows local users to execute code with elevated privileges. The vendor identifies uncontrolled DLL search-path resolution but does not disclose the affected executable, library name, or load sequence. Exploitation requires an authenticated local user, additional runtime conditions, and passive user interaction; successful loading executes attacker-controlled code with elevated privileges.

The record

CVE
CVE-2026-1636
Published
Apr 15, 2026
Updated
Apr 15, 2026
Vendor
Lenovo
Product
Lenovo Service Bridge
Classifications
CWE-427, T1574.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <5.0.2.20

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Lenovo · Lenovo Service Bridgeversion=0 <5.0.2.20

Published CVSS scores

6.7LenovoCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
5.4LenovoCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-427Uncontrolled Search Path Element
T1574.001DLL Search Order Hijacking

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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