How severe is CVE-2018-5770?

CVE-2018-5770 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-5770 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-5770?

CVE-2018-5770 affects Tendacn Ac15 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-5770?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2018-5770 published?

CVE-2018-5770 was published on 2018-03-20 and last updated on 2026-06-17.

CVE-2018-5770

CVE-2018-5770 is a critical-severity vulnerability in Tendacn Ac15 Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1188.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1188
Affected product: Tendacn Ac15 Firmware
Published: 2018-03-20
Last modified: 2026-06-17

Description

An issue was discovered on Tenda AC15 devices. A remote, unauthenticated attacker can make a request to /goform/telnet, creating a telnetd service on the device. This service is password protected; however, several default accounts exist on the device that are root accounts, which can be used to log in.

Frequently asked questions

What is CVE-2018-5770?: An issue was discovered on Tenda AC15 devices. A remote, unauthenticated attacker can make a request to /goform/telnet, creating a telnetd service on the device. This service is password protected; however, several default accounts exist on the device that are root accounts, which can be used to log in.
How severe is CVE-2018-5770?: CVE-2018-5770 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-5770 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-5770?: CVE-2018-5770 affects Tendacn Ac15 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-5770?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-5770 published?: CVE-2018-5770 was published on 2018-03-20 and last updated on 2026-06-17.

References

https://www.fidusinfosec.com/tenda-ac15-unauthenticated-telnetd-start-cve-2018-5770/

Affected products (1)

cpe:2.3:o:tendacn:ac15_firmware:-:*:*:*:*:*:*:*

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