Tenda AC6 httpd telnet os command injection

published 2026-05-11 5 mo ago modified 2026-07-23 3 mo ago also EUVD-2026-29015

cvss: 4.7; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 4.9%; EPSS 4.9% chance of exploitation in 30 days, percentile 92%
public exploits: 0; none known

A vulnerability has been found in Tenda AC6 2.0/15.03.06.23. The affected element is an unknown function of the file /goform/telnet of the component httpd. The manipulation of the argument lan.ip leads to os command injection. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 5 mo ago (2026-05-11)

Exploit prediction

4.89% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/dxz0069/WAVLINK-WN530H4-Command-Injection-in-set_add_routing/blob/main/Tenda%20AC6V2%20TendaTelnet%20Command%20Injection.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	5.1	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
CNA	3.1	4.7	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
CNA	3.0	4.7	CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
CNA	2.0	5.8	AV:N/AC:L/Au:M/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
CNA	4.0	2.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA	3.1	4.7	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
NVD	3.1	7.2	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CNA	2.0	5.8	AV:N/AC:L/Au:M/C:P/I:P/A:P

Affected products

Tenda AC6

Classification

Weakness

CWE-78 Improper Neutralization of Special Elements used in an OS Command
CWE-77 Improper Neutralization of Special Elements used in a Command

References

github.com /dxz0069/WAVLINK-WN530H4-Command-Injection-in-set_add_routing/blob/main/Tenda%20AC6V2%20TendaTelnet%20Command%
exploit, third-party-advisory
vuldb.com /vuln/362556
vdb-entry, technical-description, third-party-advisory
vuldb.com /vuln/362556/cti
signature, permissions-required, vdb-entry
vuldb.com /submit/809877
third-party-advisory, vdb-entry
tenda.com.cn /
product

Sources

CVE List CVE-2026-8259
NVD CVE-2026-8259

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary