Is CVE-2023-27021 actively exploited?

No active exploitation of CVE-2023-27021 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-27021 be exploited remotely?

Yes. CVE-2023-27021 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-27021?

CVE-2023-27021 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2023-27021

CWE-787Published: April 7, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Tenda AC10 US_AC10V4.0si_V16.03.10.13_cn was discovered to contain a stack overflow via the formSetFirewallCfg function. This vulnerability allows attackers to cause a Denial of Service (DoS) or execute arbitrary code via a crafted payload.

NVD Source

Risk Analysis

A stack overflow vulnerability in the Tenda AC10 router allows remote attackers to cause a denial of service or execute arbitrary code. The CVSS score of 9.8 highlights the critical risk posed to the device.

No public exploit is known, and it is not in the CISA KEV. The vulnerability is remotely exploitable with low attack complexity.

Recommended Action

Update the Tenda AC10 firmware to the latest version. Implement network-level access controls to limit exposure of the management interface.

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-2023-27021 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.