How severe is CVE-2018-6211?

CVE-2018-6211 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-6211 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-6211?

CVE-2018-6211 primarily affects D-link Dir-620 Firmware. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-6211?

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-2018-6211 published?

CVE-2018-6211 was published on 2018-06-20 and last updated on 2026-06-17.

CVE-2018-6211

CVE-2018-6211 is a high-severity vulnerability in D-link Dir-620 Firmware with a CVSS 3.x base score of 7.2. 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-78.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 9.0
EPSS exploit prediction: 6% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: D-link Dir-620 Firmware
Published: 2018-06-20
Last modified: 2026-06-17

Description

On D-Link DIR-620 devices with a certain customized (by ISP) variant of firmware 1.0.3, 1.0.37, 1.3.1, 1.3.3, 1.3.7, 1.4.0, and 2.0.22, OS command injection is possible as a result of incorrect processing of the res_buf parameter to index.cgi.

Frequently asked questions

What is CVE-2018-6211?: On D-Link DIR-620 devices with a certain customized (by ISP) variant of firmware 1.0.3, 1.0.37, 1.3.1, 1.3.3, 1.3.7, 1.4.0, and 2.0.22, OS command injection is possible as a result of incorrect processing of the res_buf parameter to index.cgi.
How severe is CVE-2018-6211?: CVE-2018-6211 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-6211 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-6211?: CVE-2018-6211 primarily affects D-link Dir-620 Firmware. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-6211?: 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-2018-6211 published?: CVE-2018-6211 was published on 2018-06-20 and last updated on 2026-06-17.

References

Affected products (7)

cpe:2.3:o:d-link:dir-620_firmware:1.0.3:*:*:*:*:*:*:*
cpe:2.3:o:d-link:dir-620_firmware:1.0.37:*:*:*:*:*:*:*
cpe:2.3:o:d-link:dir-620_firmware:1.3.1:*:*:*:*:*:*:*
cpe:2.3:o:d-link:dir-620_firmware:1.3.3:*:*:*:*:*:*:*
cpe:2.3:o:d-link:dir-620_firmware:1.3.7:*:*:*:*:*:*:*
cpe:2.3:o:d-link:dir-620_firmware:1.4.0:*:*:*:*:*:*:*
cpe:2.3:o:d-link:dir-620_firmware:2.0.22:*:*:*:*:*:*:*

More vulnerabilities in D-link Dir-620 Firmware

CVE-2018-6213 — Critical (CVSS 9.8): In the web server on D-Link DIR-620 devices with a certain customized (by ISP) variant of firmware 1.0.3, 1.0.37,…
CVE-2018-6212 — Medium (CVSS 6.1): On D-Link DIR-620 devices with a certain customized (by ISP) variant of firmware 1.0.3, 1.0.37, 1.3.1, 1.3.3, 1.3.7,…

All CVEs affecting D-link Dir-620 Firmware →

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