How severe is CVE-2023-43128?

CVE-2023-43128 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-2023-43128 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-43128?

CVE-2023-43128 affects Dlink Dir-806 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-43128?

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-2023-43128 published?

CVE-2023-43128 was published on 2023-09-21 and last updated on 2026-06-17.

CVE-2023-43128

CVE-2023-43128 is a critical-severity vulnerability in Dlink Dir-806 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)
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-77
Affected product: Dlink Dir-806 Firmware
Published: 2023-09-21
Last modified: 2026-06-17

Description

D-LINK DIR-806 1200M11AC wireless router DIR806A1_FW100CNb11 is vulnerable to command injection due to lax filtering of HTTP_ST parameters.

Frequently asked questions

What is CVE-2023-43128?: D-LINK DIR-806 1200M11AC wireless router DIR806A1_FW100CNb11 is vulnerable to command injection due to lax filtering of HTTP_ST parameters.
How severe is CVE-2023-43128?: CVE-2023-43128 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-2023-43128 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-43128?: CVE-2023-43128 affects Dlink Dir-806 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-43128?: 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-2023-43128 published?: CVE-2023-43128 was published on 2023-09-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:dlink:dir-806_firmware:100cnb11:*:*:*:*:*:*:*

More vulnerabilities in Dlink Dir-806 Firmware

CVE-2023-43130 — Critical (CVSS 9.8): D-LINK DIR-806 1200M11AC wireless router DIR806A1_FW100CNb11 is vulnerable to command injection.
CVE-2023-43129 — Critical (CVSS 9.8): D-LINK DIR-806 1200M11AC wireless router DIR806A1_FW100CNb11 is vulnerable to command injection due to lax filtering of…
CVE-2019-10892 — Critical (CVSS 9.8): An issue was discovered in D-Link DIR-806 devices. There is a stack-based buffer overflow in function hnap_main at…
CVE-2019-10891 — Critical (CVSS 9.8): An issue was discovered in D-Link DIR-806 devices. There is a command injection in function hnap_main, which calls…
CVE-2025-4340 — Medium (CVSS 6.3): A vulnerability classified as critical has been found in D-Link DIR-890L and DIR-806A1 up to 100CNb11/108B03. Affected…

All CVEs affecting Dlink Dir-806 Firmware →

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