CVE-2021-35231

Local privilege escalation via unquoted service path

Published Oct 25, 2021 · Updated Sep 16, 2024

Kiwi Syslog Server 9.7.2 and earlier contains an unquoted service path flaw that allows local users to gain elevated privileges via executable planting. The Installation Wizard writes an unquoted executable path for the Kiwi Syslog Server service or uninstall entry in the Windows registry, enabling path interception when Windows resolves the command. Exploitation requires local access and high privileges to place an executable in the path; successful execution can compromise confidentiality, integrity, and availability.

CVSS severity6.7
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Kiwi Syslog Server 9.7.2 and earlier contains an unquoted service path flaw that allows local users to gain elevated privileges via executable planting. The Installation Wizard writes an unquoted executable path for the Kiwi Syslog Server service or uninstall entry in the Windows registry, enabling path interception when Windows resolves the command. Exploitation requires local access and high privileges to place an executable in the path; successful execution can compromise confidentiality, integrity, and availability.

The record

CVE
CVE-2021-35231
Published
Oct 25, 2021
Updated
Sep 16, 2024
Vendor
SolarWinds
Product
Kiwi Syslog Server
Classifications
CWE-428, T1574.009
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 25, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record 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=9.7.2 and previous versions <9.8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

SolarWinds · Kiwi Syslog Serverversion=9.7.2 and previous versions <9.8

Published CVSS scores

6.7NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
4.6NVDAV:L/AC:L/Au:N/C:P/I:P/A:P

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-428Unquoted Search Path or Element
T1574.009Path Interception by PATH Environment Variable

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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