What is CVE-2023-35803?

CVE-2023-35803 is a critical-severity vulnerability in Extremenetworks Ap1130, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2023-10-04.

How severe is CVE-2023-35803?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2023-35803 known to be exploited?

7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Extremenetworks Ap1130

CVE-2023-35803

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

Vulnerability class: Buffer Overflow

Published 2023-10-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.016 (74.6th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 74.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.016 · change: +0.000

Affected products

Weakness classification (CWE)

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

Public proof-of-concept exploits

References

community.extremenetworks.com/t5/security-advisories-formerly/sa-2023-067-iq-en… (Vendor Advisory)

Frequently asked questions

What is CVE-2023-35803?: CVE-2023-35803 is a critical-severity vulnerability in Extremenetworks Ap1130, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2023-10-04.
How severe is CVE-2023-35803?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2023-35803 known to be exploited?: 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.