Is CVE-2023-40842 actively exploited?

No active exploitation of CVE-2023-40842 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-40842 be exploited remotely?

Yes. CVE-2023-40842 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-40842?

CVE-2023-40842 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2023-40842

CRITICAL

CVE-2023-40842

CWE-787Published: August 30, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Tengda AC6 US_AC6V1.0BR_V15.03.05.16_multi_TD01.bin is vulnerable to Buffer Overflow via function "R7WebsSecurityHandler."

NVD Source

Risk Analysis

The Tenda AC6 firmware is susceptible to a buffer overflow, which could lead to critical system impact. It is rated at 9.8 on the CVSS scale.

There is no public exploit known, and it is not in the CISA KEV catalog. The vulnerability is remotely exploitable.

Recommended Action

Apply the latest firmware patches provided by Tenda.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-40842 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.