How severe is CVE-2021-42783?

CVE-2021-42783 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-2021-42783 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-42783?

CVE-2021-42783 affects Dlink Dwr-932c E1 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-42783?

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-2021-42783 published?

CVE-2021-42783 was published on 2021-11-23 and last updated on 2026-06-17.

CVE-2021-42783

CVE-2021-42783 is a critical-severity vulnerability in Dlink Dwr-932c E1 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-306.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Dlink Dwr-932c E1 Firmware
Published: 2021-11-23
Last modified: 2026-06-17

Description

Missing Authentication for Critical Function vulnerability in debug_post_set.cgi of D-Link DWR-932C E1 firmware allows an unauthenticated attacker to execute administrative actions.

Frequently asked questions

What is CVE-2021-42783?: Missing Authentication for Critical Function vulnerability in debug_post_set.cgi of D-Link DWR-932C E1 firmware allows an unauthenticated attacker to execute administrative actions.
How severe is CVE-2021-42783?: CVE-2021-42783 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-2021-42783 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-42783?: CVE-2021-42783 affects Dlink Dwr-932c E1 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-42783?: 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-2021-42783 published?: CVE-2021-42783 was published on 2021-11-23 and last updated on 2026-06-17.

References

https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10246

Affected products (1)

cpe:2.3:o:dlink:dwr-932c_e1_firmware:*:*:*:*:*:*:*:*

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