CVE-2021-35235Network attack vector

Information disclosure via enabled ASP.NET debugging

Published Oct 27, 2021 · Updated Sep 17, 2024

ASP.NET debug misconfiguration in SolarWinds Kiwi Syslog Server 9.7.2 and earlier allows remote attackers to disclose sensitive information. Kiwi Syslog Web Access ships with ASP.NET debugging enabled, causing compilation to retain extra debugger information that supports close monitoring and control of application execution. No authentication or user interaction is required, but exploitation requires a successful remote debugging session and is limited to disclosed web application and infrastructure details.

CVSS severity5.3
Medium
EPSS probability1.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

ASP.NET debug misconfiguration in SolarWinds Kiwi Syslog Server 9.7.2 and earlier allows remote attackers to disclose sensitive information. Kiwi Syslog Web Access ships with ASP.NET debugging enabled, causing compilation to retain extra debugger information that supports close monitoring and control of application execution. No authentication or user interaction is required, but exploitation requires a successful remote debugging session and is limited to disclosed web application and infrastructure details.

The record

CVE
CVE-2021-35235
Published
Oct 27, 2021
Updated
Sep 17, 2024
Vendor
SolarWinds
Product
Kiwi Syslog Server
Classifications
CWE-11, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 27, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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 vectornetwork
Required privilegesunauthenticated

What is affected?

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

Published CVSS scores

5.3SolarWindsCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.0NISTAV:N/AC:L/Au:N/C:P/I:N/A:N
5.3SolarWindsCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A: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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-11ASP.NET Misconfiguration: Creating Debug Binary
T1190Exploit Public-Facing Application

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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