PatchTheCVECVE-2021-33259: Several web interfaces in D-Link DIR-868LW 1.12b have no authentication requirements for access, allowing for
CVE-2021-33259 is a medium-severity flaw (CVSS 5.3) affecting dir-868lw firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Public exploit reference
- Remotely exploitable, no login, no user action
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 5.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.8% (top 22%) |
| CISA exploited list | No |
| Weakness | CWE-306 |
| Published | 2021-10-31 |
| Last modified | 2026-07-09 |
Last updated 2026-07-09 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-33259?
dir-868lw firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2021-33259 being exploited?
CVE-2021-33259 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-33259 affect?
CVE-2021-33259 affects dir-868lw firmware. Severity is medium (CVSS 5.3). 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 urgent is CVE-2021-33259?
Priority 48/100. Public exploit reference; Remotely exploitable, no login, no user action