How severe is CVE-2018-6210?

CVE-2018-6210 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-2018-6210 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-6210?

CVE-2018-6210 affects Dlink Dir-620 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-6210?

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-2018-6210 published?

CVE-2018-6210 was published on 2018-06-19 and last updated on 2026-06-17.

CVE-2018-6210

CVE-2018-6210 is a critical-severity vulnerability in Dlink Dir-620 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-798.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-798
Affected product: Dlink Dir-620 Firmware
Published: 2018-06-19
Last modified: 2026-06-17

Description

D-Link DIR-620 devices, with a certain Rostelekom variant of firmware 1.0.37, have a hardcoded rostel account, which makes it easier for remote attackers to obtain access via a TELNET session.

Frequently asked questions

What is CVE-2018-6210?: D-Link DIR-620 devices, with a certain Rostelekom variant of firmware 1.0.37, have a hardcoded rostel account, which makes it easier for remote attackers to obtain access via a TELNET session.
How severe is CVE-2018-6210?: CVE-2018-6210 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-2018-6210 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-6210?: CVE-2018-6210 affects Dlink Dir-620 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-6210?: 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-2018-6210 published?: CVE-2018-6210 was published on 2018-06-19 and last updated on 2026-06-17.

References

https://securelist.com/backdoors-in-d-links-backyard/85530/

Affected products (1)

cpe:2.3:o:dlink:dir-620_firmware:1.0.37:*:*:*:*:*:*:*

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