How severe is CVE-2012-4434?

CVE-2012-4434 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2012-4434 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-4434?

CVE-2012-4434 affects Cipherdyne Fwknop. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2012-4434?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2012-4434 published?

CVE-2012-4434 was published on 2020-01-09 and last updated on 2026-06-16.

CVE-2012-4434

CVE-2012-4434 is a high-severity vulnerability in Cipherdyne Fwknop with a CVSS 3.x base score of 8.8. 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-276.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-276
Affected product: Cipherdyne Fwknop
Published: 2020-01-09
Last modified: 2026-06-16

Description

fwknop before 2.0.3 allow remote authenticated users to cause a denial of service (server crash) or possibly execute arbitrary code.

Frequently asked questions

What is CVE-2012-4434?: fwknop before 2.0.3 allow remote authenticated users to cause a denial of service (server crash) or possibly execute arbitrary code.
How severe is CVE-2012-4434?: CVE-2012-4434 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2012-4434 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-4434?: CVE-2012-4434 affects Cipherdyne Fwknop. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2012-4434?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2012-4434 published?: CVE-2012-4434 was published on 2020-01-09 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:cipherdyne:fwknop:*:*:*:*:*:*:*:*

More vulnerabilities in Cipherdyne Fwknop

CVE-2012-4436 — Medium (CVSS 4.4): Buffer overflow in the run_last_args function in client/fwknop.c in fwknop before 2.0.3, when processing --last, might…
CVE-2012-4435 — Medium (CVSS 4.0): fwknop before 2.0.3 does not properly validate IP addresses, which allows remote authenticated users to cause a denial…

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