How severe is CVE-2021-33259?

CVE-2021-33259 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-33259 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33259?

CVE-2021-33259 affects D-link Dir-868lw Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-33259?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-33259 published?

CVE-2021-33259 was published on 2021-10-31 and last updated on 2026-07-09.

CVE-2021-33259

CVE-2021-33259 is a medium-severity vulnerability in D-link Dir-868lw Firmware with a CVSS 3.x base score of 5.3. 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: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: D-link Dir-868lw Firmware
Published: 2021-10-31
Last modified: 2026-07-09

Description

Several web interfaces in D-Link DIR-868LW 1.12b have no authentication requirements for access, allowing for attackers to obtain users' DNS query history.

Frequently asked questions

What is CVE-2021-33259?: Several web interfaces in D-Link DIR-868LW 1.12b have no authentication requirements for access, allowing for attackers to obtain users' DNS query history.
How severe is CVE-2021-33259?: CVE-2021-33259 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-33259 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33259?: CVE-2021-33259 affects D-link Dir-868lw Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-33259?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-33259 published?: CVE-2021-33259 was published on 2021-10-31 and last updated on 2026-07-09.

References

Affected products (1)

cpe:2.3:o:d-link:dir-868lw_firmware:1.12b:*:*:*:*:*:*:*

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