How severe is CVE-2020-9279?

CVE-2020-9279 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-2020-9279 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-9279?

CVE-2020-9279 affects Dlink Dsl-2640b Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-9279?

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-2020-9279 published?

CVE-2020-9279 was published on 2020-04-20 and last updated on 2026-06-17.

CVE-2020-9279

CVE-2020-9279 is a critical-severity vulnerability in Dlink Dsl-2640b 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: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-798
Affected product: Dlink Dsl-2640b Firmware
Published: 2020-04-20
Last modified: 2026-06-17

Description

An issue was discovered on D-Link DSL-2640B B2 EU_4.01B devices. A hard-coded account allows management-interface login with high privileges. The logged-in user can perform critical tasks and take full control of the device.

Frequently asked questions

What is CVE-2020-9279?: An issue was discovered on D-Link DSL-2640B B2 EU_4.01B devices. A hard-coded account allows management-interface login with high privileges. The logged-in user can perform critical tasks and take full control of the device.
How severe is CVE-2020-9279?: CVE-2020-9279 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-2020-9279 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-9279?: CVE-2020-9279 affects Dlink Dsl-2640b Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-9279?: 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-2020-9279 published?: CVE-2020-9279 was published on 2020-04-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:dlink:dsl-2640b_firmware:eu_4.01b:*:*:*:*:*:*:*

More vulnerabilities in Dlink Dsl-2640b Firmware

CVE-2020-9277 — Critical (CVSS 9.8): An issue was discovered on D-Link DSL-2640B B2 EU_4.01B devices. Authentication can be bypassed when accessing cgi…
CVE-2020-9275 — Critical (CVSS 9.8): An issue was discovered on D-Link DSL-2640B B2 EU_4.01B devices. A cfm UDP service listening on port 65002 allows…
CVE-2020-9278 — Critical (CVSS 9.1): An issue was discovered on D-Link DSL-2640B B2 EU_4.01B devices. The device can be reset to its default configuration…
CVE-2020-9276 — High (CVSS 8.8): An issue was discovered on D-Link DSL-2640B B2 EU_4.01B devices. The function do_cgi(), which processes cgi requests…
CVE-2012-1308 — Medium (CVSS 6.8): Cross-site request forgery (CSRF) vulnerability in redpass.cgi in D-Link DSL-2640B Firmware EU_4.00 allows remote…

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