CVE-2023-33020

HIGHNVD 7.57.5—

7.5

Transient DOS in WLAN Host when an invalid channel (like channel out of range) is received in STA during CSA IE.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 23.0%
KEV: Not listed

Published

September 5, 2023

Last Modified

November 21, 2024

References (2)

product-security@qualcommhttps://www.qualcomm.com/company/product-security/bulletins/september-2023-bulletin
af854a3a-2127-422b-91ae-364da2661108https://www.qualcomm.com/company/product-security/bulletins/september-2023-bulletin

Weakness Classification(1)

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

CWE-285Improper Authorization

Data Freshness Timeline

(refreshed 14× 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.

2026-06-02 20:12 UTCepss_batch
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Frequently asked(5)

What is CVE-2023-33020?

CVE-2023-33020 is a high vulnerability published on September 5, 2023. Transient DOS in WLAN Host when an invalid channel (like channel out of range) is received in STA during CSA IE.

When was CVE-2023-33020 disclosed?

CVE-2023-33020 was first published in the National Vulnerability Database on September 5, 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-2023-33020 actively exploited?

CVE-2023-33020 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 23.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-33020?

CVE-2023-33020 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2023-33020?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-33020, 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-2023-33020

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-33020?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)