CVE-2011-4720

NONECVSS 0.0Weaponized

0.0

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.

CVSS v3: —
EG Score: 0.0(none)
EPSS: 95.6%
KEV: Not listed

Published

December 28, 2014

Last Modified

May 6, 2026

References (2)

cve@mitrehttp://secpod.org/blog/?p=419
af854a3a-2127-422b-91ae-364da2661108http://secpod.org/blog/?p=419

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-20Improper Input Validation

Data Freshness Timeline

(refreshed 10× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-05 22:44 UTCepss_batch
2026-06-05 22:44 UTCepss_batch
2026-06-04 13:09 UTCepss_batch
2026-06-02 20:10 UTCepss_batch
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2026-06-01 13:49 UTCepss_batch
2026-05-31 22:28 UTCepss_batch
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2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-28 14:22 UTCEG score recompute
2026-05-28 14:22 UTCGHSA enrichment
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
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2026-05-26 07:16 UTCepss_batch

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Exploit-DBEDB-18188✓ verified
First seen Dec 2, 2011
Hillstone Software HS TFTP Server 1.3.2 - Denial of Service
Open source ↗

Frequently asked(4)

What is CVE-2011-4720?

CVE-2011-4720 is a none vulnerability published on December 28, 2014. 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.

When was CVE-2011-4720 disclosed?

CVE-2011-4720 was first published in the National Vulnerability Database on December 28, 2014, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2011-4720 actively exploited?

CVE-2011-4720 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 95.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2011-4720?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2011-4720, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2011-4720

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(4)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2011-4720?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(4)

Related CVEs(same CWE)