CVE-2023-35803

CRITICALNVD 9.89.8—Elevated

9.8

IQ Engine before 10.6r2 on Extreme Network AP devices has a Buffer Overflow.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 90.4%
KEV: Not listed

Published

October 4, 2023

Last Modified

November 21, 2024

References (2)

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 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

GitHub PoClachlan2k/CVE-2023-35803
First seen Jul 10, 2023
PoC Exploit for CVE-2023-35803 Unauthenticated Buffer Overflow in Aerohive HiveOS/Extreme Networks IQ Engine
Open source ↗

Frequently asked(5)

What is CVE-2023-35803?

CVE-2023-35803 is a critical vulnerability published on October 4, 2023. IQ Engine before 10.6r2 on Extreme Network AP devices has a Buffer Overflow.

When was CVE-2023-35803 disclosed?

CVE-2023-35803 was first published in the National Vulnerability Database on October 4, 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-2023-35803 actively exploited?

CVE-2023-35803 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 90.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-35803?

CVE-2023-35803 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2023-35803?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-35803, 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-2023-35803

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-35803?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)