How severe is CVE-2021-35231?

CVE-2021-35231 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-35231 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-35231?

CVE-2021-35231 affects Solarwinds Kiwi Syslog Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-35231?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-35231 published?

CVE-2021-35231 was published on 2021-10-25 and last updated on 2026-06-17.

CVE-2021-35231

CVE-2021-35231 is a medium-severity vulnerability in Solarwinds Kiwi Syslog Server with a CVSS 3.x base score of 6.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-428.

Key facts

Severity: Medium (CVSS 3.x base score 6.7)
CVSS v2: 4.6
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-428
Affected product: Solarwinds Kiwi Syslog Server
Published: 2021-10-25
Last modified: 2026-06-17

Description

As a result of an unquoted service path vulnerability present in the Kiwi Syslog Server Installation Wizard, a local attacker could gain escalated privileges by inserting an executable into the path of the affected service or uninstall entry. Example vulnerable path: "Computer\HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Kiwi Syslog Server\Parameters\Application".

Frequently asked questions

What is CVE-2021-35231?: As a result of an unquoted service path vulnerability present in the Kiwi Syslog Server Installation Wizard, a local attacker could gain escalated privileges by inserting an executable into the path of the affected service or uninstall entry. Example vulnerable path: "Computer\HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Kiwi Syslog Server\Parameters\Application".
How severe is CVE-2021-35231?: CVE-2021-35231 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-35231 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-35231?: CVE-2021-35231 affects Solarwinds Kiwi Syslog Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-35231?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-35231 published?: CVE-2021-35231 was published on 2021-10-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:solarwinds:kiwi_syslog_server:*:*:*:*:*:*:*:*

More vulnerabilities in Solarwinds Kiwi Syslog Server

CVE-2021-35235 — Medium (CVSS 5.3): The ASP.NET debug feature is enabled by default in Kiwi Syslog Server 9.7.2 and previous versions. ASP.NET allows…
CVE-2021-35233 — Medium (CVSS 5.3): The HTTP TRACK & TRACE methods were enabled in Kiwi Syslog Server 9.7.1 and earlier. These methods are intended for…
CVE-2021-35237 — Medium (CVSS 5.0): A missing HTTP header (X-Frame-Options) in Kiwi Syslog Server has left customers vulnerable to click jacking.…
CVE-2021-35236 — Low (CVSS 3.1): The Secure flag is not set in the SSL Cookie of Kiwi Syslog Server 9.7.2 and previous versions. The Secure attribute…

All CVEs affecting Solarwinds Kiwi Syslog Server →

Other CWE-428 vulnerabilities

CVE-2022-50935 — Critical (CVSS 9.8): Flame II HSPA USB Modem contains an unquoted service path vulnerability in its Windows service configuration. Attackers…
CVE-2023-38408 — Critical (CVSS 9.8): The PKCS#11 feature in ssh-agent in OpenSSH before 9.3p2 has an insufficiently trustworthy search path, leading to…
CVE-2022-36344 — Critical (CVSS 9.8): An unquoted search path vulnerability exists in 'JustSystems JUST Online Update for J-License' bundled with multiple…
CVE-2020-9292 — Critical (CVSS 9.8): An unquoted service path vulnerability in the FortiSIEM Windows Agent component may allow an attacker to gain elevated…
CVE-2019-17658 — Critical (CVSS 9.8): An unquoted service path vulnerability in the FortiClient FortiTray component of FortiClientWindows v6.2.2 and prior…
CVE-2019-8459 — Critical (CVSS 9.8): Check Point Endpoint Security Client for Windows, with the VPN blade, before version E80.83, starts a process without…

Browse all CWE-428 vulnerabilities →