VulnTideExploited vulnerabilities, by vendor. Data as of .
Not in CISA KEVReported exploited: VulnCheck KEV since Published CVSS 5.3 mediumEPSS 16.7% probability of exploitation in 30 days
Tenda

CVE-2025-9090: Tenda AC20 Telnet Service telnet websFormDefine command injection

Is it exploited?

Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of .

VulnCheck KEV lists it since . It cites 1 public report, the first from . VulnCheck's own honeypots also recorded exploitation attempts.

How likely is exploitation in the next 30 days?
16.7%

EPSS score, percentile 97 of all scored records. A probability estimated by FIRST, not a report of exploitation.

CISA's SSVC assessment in the CVE record lists exploitation as poc.

How severe?
5.3 Medium

CVSS v4.0 base score, given by the CNA

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Affected

  • 16.03.08.12

Versions by product

Source: CISA KEV 2026.10.29, as of ; VulnCheck KEV, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.

Description

Tenda AC20 Telnet Service telnet websFormDefine command injection

A vulnerability was identified in Tenda AC20 16.03.08.12. Affected is the function websFormDefine of the file /goform/telnet of the component Telnet Service. The manipulation leads to command injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

Source: CVE List, as of . About the data.

What to do

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

Versions by product, as listed in the CVE record (1 product)
Tenda AC20
StatusVersions
Affected16.03.08.12

Source: CVE List, as of . About the data.

Weakness

CWE-77, CWE-74

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.

Timeline

DateEvent
CVE record published
CVE record last updated

References

6

Known exploited Tenda vulnerabilities

  • CVE-2018-14558: Tenda AC7, AC9, and AC10 Routers Command Injection Vulnerability (added )
  • CVE-2020-10987: Tenda AC1900 Router AC15 Model Remote Code Execution Vulnerability (added )
  • CVE-2021-31755: Tenda AC11 Router Stack Buffer Overflow Vulnerability (added )