CVE-2023-36355

CRITICALNVD 9.99.9—Elevated

9.9

TP-Link TL-WR940N V4 was discovered to contain a buffer overflow via the ipStart parameter at /userRpm/WanDynamicIpV6CfgRpm. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted GET request.

CVSS v3: 9.9
EG Score: 9.9(medium)
EPSS: 97.1%
KEV: Not listed

Published

June 22, 2023

Last Modified

November 21, 2024

Advisory Details (1)

Auto-updated May 24, 2026

No patch confirmed yet.

generic

Packet Storm

http://packetstormsecurity.com/files/173294/TP-Link-TL-WR940N-4-Buffer-Overflow.html

Weakness Classification(1)

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

CWE-120Buffer Copy without Checking Size (Classic Buffer Overflow)

Data Freshness Timeline

(refreshed 18× 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.

2026-06-06 13:46 UTCepss_batch
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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-51561
First seen Jul 3, 2023
TP-Link TL-WR940N V4 - Buffer OverFlow
Open source ↗

Frequently asked(5)

What is CVE-2023-36355?

CVE-2023-36355 is a critical vulnerability published on June 22, 2023. TP-Link TL-WR940N V4 was discovered to contain a buffer overflow via the ipStart parameter at /userRpm/WanDynamicIpV6CfgRpm. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted GET request.

When was CVE-2023-36355 disclosed?

CVE-2023-36355 was first published in the National Vulnerability Database on June 22, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-36355 actively exploited?

CVE-2023-36355 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 97.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-36355?

CVE-2023-36355 has a CVSS v3 base score of 9.9 (NVD).

How do I remediate CVE-2023-36355?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-36355, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2023-36355

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CVE-2023-36355

📅 Published

🔄 Last Modified

📋 Advisory Details (1)