How severe is CVE-2011-4720?

CVE-2011-4720 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2011-4720 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-4720?

CVE-2011-4720 affects Hillstone Software Hs Tftp Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2011-4720?

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

When was CVE-2011-4720 published?

CVE-2011-4720 was published on 2014-12-28 and last updated on 2026-06-16.

CVE-2011-4720

CVE-2011-4720 is a medium-severity vulnerability in Hillstone Software Hs Tftp Server with a CVSS 2.0 base score of 5.0. 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-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Hillstone Software Hs Tftp Server
Published: 2014-12-28
Last modified: 2026-06-16

Description

Hillstone HS TFTP Server 1.3.2 allows remote attackers to cause a denial of service (daemon crash) via a long filename in a (1) RRQ or (2) WRQ operation.

Frequently asked questions

What is CVE-2011-4720?: Hillstone HS TFTP Server 1.3.2 allows remote attackers to cause a denial of service (daemon crash) via a long filename in a (1) RRQ or (2) WRQ operation.
How severe is CVE-2011-4720?: CVE-2011-4720 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2011-4720 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-4720?: CVE-2011-4720 affects Hillstone Software Hs Tftp Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2011-4720?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-4720 published?: CVE-2011-4720 was published on 2014-12-28 and last updated on 2026-06-16.

References

http://secpod.org/blog/?p=419

Affected products (1)

cpe:2.3:a:hillstone_software:hs_tftp_server:1.3.2:*:*:*:*:*:*:*

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