How severe is CVE-2021-4433?

CVE-2021-4433 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2021-4433 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-4433?

CVE-2021-4433 affects Karjasoft Sami Http Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-4433?

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

Does CVE-2021-4433 have an EU (EUVD) identifier?

Yes. CVE-2021-4433 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-34260.

When was CVE-2021-4433 published?

CVE-2021-4433 was published on 2024-01-18 and last updated on 2026-06-17.

CVE-2021-4433

CVE-2021-4433 is a medium-severity vulnerability in Karjasoft Sami Http Server with a CVSS 3.x base score of 5.3. 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-404.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2021-34260
Weakness: CWE-404
Affected product: Karjasoft Sami Http Server
Published: 2024-01-18
Last modified: 2026-06-17

Description

A vulnerability was found in Karjasoft Sami HTTP Server 2.0. It has been classified as problematic. Affected is an unknown function of the component HTTP HEAD Rrequest Handler. The manipulation leads to denial of service. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-250836.

Frequently asked questions

What is CVE-2021-4433?: A vulnerability was found in Karjasoft Sami HTTP Server 2.0. It has been classified as problematic. Affected is an unknown function of the component HTTP HEAD Rrequest Handler. The manipulation leads to denial of service. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-250836.
How severe is CVE-2021-4433?: CVE-2021-4433 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2021-4433 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-4433?: CVE-2021-4433 affects Karjasoft Sami Http Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-4433?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2021-4433 have an EU (EUVD) identifier?: Yes. CVE-2021-4433 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-34260.
When was CVE-2021-4433 published?: CVE-2021-4433 was published on 2024-01-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:karjasoft:sami_http_server:2.0:*:*:*:*:*:*:*

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