How severe is CVE-2021-43474?

CVE-2021-43474 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-2021-43474 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-2021-43474?

CVE-2021-43474 affects Dlink Dir-823g Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43474?

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-2021-43474 published?

CVE-2021-43474 was published on 2022-04-07 and last updated on 2026-06-17.

CVE-2021-43474

CVE-2021-43474 is a critical-severity vulnerability in Dlink Dir-823g 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-77.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-77
Affected product: Dlink Dir-823g Firmware
Published: 2022-04-07
Last modified: 2026-06-17

Description

An Access Control vulnerability exists in D-Link DIR-823G REVA1 1.02B05 (Lastest) via any parameter in the HNAP1 function

Frequently asked questions

What is CVE-2021-43474?: An Access Control vulnerability exists in D-Link DIR-823G REVA1 1.02B05 (Lastest) via any parameter in the HNAP1 function
How severe is CVE-2021-43474?: CVE-2021-43474 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-2021-43474 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-2021-43474?: CVE-2021-43474 affects Dlink Dir-823g Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43474?: 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-2021-43474 published?: CVE-2021-43474 was published on 2022-04-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:dlink:dir-823g_firmware:1.02b05:*:*:*:*:*:*:*

More vulnerabilities in Dlink Dir-823g Firmware

CVE-2023-43241 — Critical (CVSS 9.8): D-Link DIR-823G v1.0.2B05 was discovered to contain a stack overflow via parameter TXPower and GuardInt in…
CVE-2023-43235 — Critical (CVSS 9.8): D-Link DIR-823G v1.0.2B05 was discovered to contain a stack overflow via parameter StartTime and EndTime in…
CVE-2023-26616 — Critical (CVSS 9.8): D-Link DIR-823G firmware version 1.02B05 has a buffer overflow vulnerability, which originates from the URL field in…
CVE-2023-26613 — Critical (CVSS 9.8): An OS command injection vulnerability in D-Link DIR-823G firmware version 1.02B05 allows unauthorized attackers to…
CVE-2023-26612 — Critical (CVSS 9.8): D-Link DIR-823G firmware version 1.02B05 has a buffer overflow vulnerability, which originates from the HostName field…
CVE-2023-29665 — Critical (CVSS 9.8): D-Link DIR823G_V1.0.2B05 was discovered to contain a stack overflow via the NewPassword parameters in SetPasswdSettings.

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