How severe is CVE-2021-35236?

CVE-2021-35236 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-35236 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-35236?

CVE-2021-35236 affects Solarwinds Kiwi Syslog Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-35236?

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

When was CVE-2021-35236 published?

CVE-2021-35236 was published on 2021-10-27 and last updated on 2026-06-17.

CVE-2021-35236

CVE-2021-35236 is a low-severity vulnerability in Solarwinds Kiwi Syslog Server with a CVSS 3.x base score of 3.1. 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-311.

Key facts

Severity: Low (CVSS 3.x base score 3.1)
CVSS v2: 5.0
EPSS exploit prediction: 1% (39th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-311
Affected product: Solarwinds Kiwi Syslog Server
Published: 2021-10-27
Last modified: 2026-06-17

Description

The Secure flag is not set in the SSL Cookie of Kiwi Syslog Server 9.7.2 and previous versions. The Secure attribute tells the browser to only send the cookie if the request is being sent over a secure channel such as HTTPS. This will help protect the cookie from being passed over unencrypted requests. If the application can be accessed over both HTTP, there is a potential for the cookie can be sent in clear text.

Frequently asked questions

What is CVE-2021-35236?: The Secure flag is not set in the SSL Cookie of Kiwi Syslog Server 9.7.2 and previous versions. The Secure attribute tells the browser to only send the cookie if the request is being sent over a secure channel such as HTTPS. This will help protect the cookie from being passed over unencrypted requests. If the application can be accessed over both HTTP, there is a potential for the cookie can be sent in clear text.
How severe is CVE-2021-35236?: CVE-2021-35236 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-35236 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-35236?: CVE-2021-35236 affects Solarwinds Kiwi Syslog Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-35236?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-35236 published?: CVE-2021-35236 was published on 2021-10-27 and last updated on 2026-06-17.

References

Affected products (1)

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

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