No exploitation reported

CVE-2023-40839

No exploitation reported by the sources we read.

Published2023-08-30
WeaknessCWE-78

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Tenda AC6 US_AC6V1.0BR_V15.03.05.16_multi_TD01.bin function 'sub_ADF3C' contains a command execution vulnerability. In the "formSetIptv" function, obtaining the "list" and "vlanId" fields, unfiltered passing these two fields as parameters to the "sub_ADF3C" function to execute commands.

Timeline

dates in UTC

2023-08-3017:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-40839?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-40839?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

CISA-ADP · NVD

Tenda ac6

Branch	Affected	Fixed in	Source
1.0	= 1.0br_v15.03.05.16_multi_td01.bin	no fix published	CISA-ADP

Tenda ac6 firmwareversion to verify

Branch	Affected	Fixed in	Source
15.3	= 15.03.05.16	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2024-10-01
OpenCVESSVC decisionnone—
NVDCVSS 3.19.8read 2026-10-23
NVDweakness (CWE)CWE-78read 2026-10-23
FIRST EPSSEPSS score1.0 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2023-08-30
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2023-40839?

Is CVE-2023-40839 actively exploited?

Active exploitation of CVE-2023-40839 has not been confirmed. Its EPSS score was 1.0% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-40839?

CVE-2023-40839 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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