How severe is CVE-2023-35803?

CVE-2023-35803 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-35803 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-35803?

CVE-2023-35803 affects Extremenetworks Iq Engine. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-35803?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-35803 published?

CVE-2023-35803 was published on 2023-10-04 and last updated on 2026-06-17.

CVE-2023-35803

CVE-2023-35803 is a critical-severity vulnerability in Extremenetworks Iq Engine with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Extremenetworks Iq Engine
Published: 2023-10-04
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2023-35803?: IQ Engine before 10.6r2 on Extreme Network AP devices has a Buffer Overflow.
How severe is CVE-2023-35803?: CVE-2023-35803 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-35803 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-35803?: CVE-2023-35803 affects Extremenetworks Iq Engine. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-35803?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-35803 published?: CVE-2023-35803 was published on 2023-10-04 and last updated on 2026-06-17.

References

https://community.extremenetworks.com/t5/security-advisories-formerly/sa-2023-067-iq-engine-acsd-service-buffer-overflow-cve-2023/ba-p/96472

Affected products (1)

cpe:2.3:o:extremenetworks:iq_engine:*:*:*:*:*:*:*:*

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