How severe is CVE-2023-39086?

CVE-2023-39086 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2023-39086 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-39086?

CVE-2023-39086 affects Asus Rt-ac66u B1 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-39086?

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

When was CVE-2023-39086 published?

CVE-2023-39086 was published on 2023-08-08 and last updated on 2026-07-05.

CVE-2023-39086

CVE-2023-39086 is a high-severity vulnerability in Asus Rt-ac66u B1 Firmware with a CVSS 3.x base score of 7.5. 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-319.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-319
Affected product: Asus Rt-ac66u B1 Firmware
Published: 2023-08-08
Last modified: 2026-07-05

Description

ASUS RT-AC66U B1 3.0.0.4.286_51665 was discovered to transmit sensitive information in cleartext.

Frequently asked questions

What is CVE-2023-39086?: ASUS RT-AC66U B1 3.0.0.4.286_51665 was discovered to transmit sensitive information in cleartext.
How severe is CVE-2023-39086?: CVE-2023-39086 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2023-39086 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-39086?: CVE-2023-39086 affects Asus Rt-ac66u B1 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-39086?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-39086 published?: CVE-2023-39086 was published on 2023-08-08 and last updated on 2026-07-05.

References

Affected products (1)

cpe:2.3:o:asus:rt-ac66u_b1_firmware:3.0.0.4.286_51665:*:*:*:*:*:*:*

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