How severe is CVE-2021-46008?

CVE-2021-46008 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-46008 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-46008?

CVE-2021-46008 affects Totolink A3100r Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-46008?

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

When was CVE-2021-46008 published?

CVE-2021-46008 was published on 2022-03-30 and last updated on 2026-07-05.

CVE-2021-46008

CVE-2021-46008 is a high-severity vulnerability in Totolink A3100r Firmware with a CVSS 3.x base score of 8.8. 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-798.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 7.9
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-798
Affected product: Totolink A3100r Firmware
Published: 2022-03-30
Last modified: 2026-07-05

Description

In totolink a3100r V5.9c.4577, the hard-coded telnet password can be discovered from official released firmware. An attacker, who has connected to the Wi-Fi, can easily telnet into the target with root shell if the telnet is function turned on.

Frequently asked questions

What is CVE-2021-46008?: In totolink a3100r V5.9c.4577, the hard-coded telnet password can be discovered from official released firmware. An attacker, who has connected to the Wi-Fi, can easily telnet into the target with root shell if the telnet is function turned on.
How severe is CVE-2021-46008?: CVE-2021-46008 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-46008 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-46008?: CVE-2021-46008 affects Totolink A3100r Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-46008?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-46008 published?: CVE-2021-46008 was published on 2022-03-30 and last updated on 2026-07-05.

References

Affected products (1)

cpe:2.3:o:totolink:a3100r_firmware:5.9c.4577:*:*:*:*:*:*:*

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