How severe is CVE-2020-21016?

CVE-2020-21016 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-2020-21016 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-21016?

CVE-2020-21016 affects Dlink Dir-846 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-21016?

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-2020-21016 published?

CVE-2020-21016 was published on 2022-10-31 and last updated on 2026-06-17.

CVE-2020-21016

CVE-2020-21016 is a critical-severity vulnerability in Dlink Dir-846 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-94.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Dlink Dir-846 Firmware
Published: 2022-10-31
Last modified: 2026-06-17

Description

D-Link DIR-846 devices with firmware 100A35 allow remote attackers to execute arbitrary code as root via HNAP1/control/SetGuestWLanSettings.php.

Frequently asked questions

What is CVE-2020-21016?: D-Link DIR-846 devices with firmware 100A35 allow remote attackers to execute arbitrary code as root via HNAP1/control/SetGuestWLanSettings.php.
How severe is CVE-2020-21016?: CVE-2020-21016 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-2020-21016 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-21016?: CVE-2020-21016 affects Dlink Dir-846 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-21016?: 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-2020-21016 published?: CVE-2020-21016 was published on 2022-10-31 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:dlink:dir-846_firmware:100a35:*:*:*:*:*:*:*

More vulnerabilities in Dlink Dir-846 Firmware

CVE-2022-46642 — Critical (CVSS 9.9): D-Link DIR-846 A1_FW100A43 was discovered to contain a command injection vulnerability via the auto_upgrade_hour…
CVE-2022-46641 — Critical (CVSS 9.9): D-Link DIR-846 A1_FW100A43 was discovered to contain a command injection vulnerability via the lan(0)_dhcps_staticlist…
CVE-2023-33735 — Critical (CVSS 9.8): D-Link DIR-846 v1.00A52 was discovered to contain a remote command execution (RCE) vulnerability via the…
CVE-2021-46319 — Critical (CVSS 9.8): Remote Code Execution (RCE) vulnerability exists in D-Link Router DIR-846 DIR846A1_FW100A43.bin and…
CVE-2021-46315 — Critical (CVSS 9.8): Remote Command Execution (RCE) vulnerability exists in HNAP1/control/SetWizardConfig.php in D-Link Router DIR-846…
CVE-2021-46314 — Critical (CVSS 9.8): A Remote Command Execution (RCE) vulnerability exists in HNAP1/control/SetNetworkTomographySettings.php of D-Link…

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