What is CVE-2023-27021?

CVE-2023-27021 is a critical-severity vulnerability in Tenda Ac10, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2023-04-07.

How severe is CVE-2023-27021?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2023-27021 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Tenda Ac10

CVE-2023-27021

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.

Vulnerability class: Buffer Overflow

EPSS: 0.011 (62.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Tenda Ac10 — versions 4.0
Tenda Ac10_firmware — versions 16.03.10.13_cn
N/a — versions n/a

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

t115t0n4/firmware-vuln-reappears

References

cve@mitre.org (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-27021?: CVE-2023-27021 is a critical-severity vulnerability in Tenda Ac10, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2023-04-07.
How severe is CVE-2023-27021?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2023-27021 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.