VDB-236617 · CVE-2023-39086 · EUVD-2023-42833

ASUS RT-AC66U B1 3.0.0.4.286_51665 cleartext transmission

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.6	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in ASUS RT-AC66U B1 3.0.0.4.286_51665 and classified as problematic. The impacted element is an unknown function. This manipulation causes cleartext transmission. This vulnerability is tracked as CVE-2023-39086. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in ASUS RT-AC66U B1 3.0.0.4.286_51665. It has been declared as problematic. Affected by this vulnerability is an unknown part. The manipulation with an unknown input leads to a cleartext transmission vulnerability. The CWE definition for the vulnerability is CWE-319. The product transmits sensitive or security-critical data in cleartext in a communication channel that can be sniffed by unauthorized actors. As an impact it is known to affect confidentiality.

The weakness was disclosed 08/09/2023. The advisory is shared at 121.41.98.87. This vulnerability is known as CVE-2023-39086 since 07/25/2023. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1040 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-42833). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

ASUS

Name

RT-AC66U B1

Version

3.0.0.4.286_51665

License

commercial

Website

Vendor: https://www.asus.com/

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.6

VulDB Base Score: 3.7
VulDB Temp Score: 3.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Cleartext transmission
CWE: CWE-319 / CWE-310
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/25/2023 🔍
08/09/2023 +15 days 🔍
08/09/2023 +0 days 🔍
01/23/2026 +898 days 🔍

Sourcesinfo

Vendor: asus.com

Advisory: 121.41.98.87
Status: Not defined

CVE: CVE-2023-39086 (🔍)
GCVE (CVE): GCVE-0-2023-39086
GCVE (VulDB): GCVE-100-236617
EUVD: 🔍

Entryinfo

Created: 08/09/2023 08:12
Updated: 01/23/2026 10:16
Changes: 08/09/2023 08:12 (36), 09/02/2023 13:18 (11), 01/23/2026 10:16 (16)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.