PatchTheCVECVE-2018-19989: In the /HNAP1/SetQoSSettings message, the uplink parameter is vulnerable, and the vulnerability affects D-Link
CVE-2018-19989 is a critical-severity flaw (CVSS 9.8) affecting dir-822 firmware, dir-822 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
In the /HNAP1/SetQoSSettings message, the uplink parameter is vulnerable, and the vulnerability affects D-Link DIR-822 Rev.B 202KRb06 and DIR-822 Rev.C 3.10B06 devices. In the SetQoSSettings.php source code, the uplink parameter is saved in the /bwc/entry:1/bandwidth and /bwc/entry:2/bandwidth internal configuration memory without any regex checking. And in the bwc_tc_spq_start, bwc_tc_wfq_start, and bwc_tc_adb_start functions of the bwcsvcs.php
Why this priority
- Critical severity
- EPSS top 7%: very likely to be exploited
- 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 | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 5.5% (top 7%) |
| CISA exploited list | No |
| Weakness | CWE-78 |
| Published | 2019-05-13 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · 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-2018-19989?
dir-822 firmware: mitigate or apply the listed mitigation; dir-822 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2018-19989 being exploited?
CVE-2018-19989 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-2018-19989 affect?
CVE-2018-19989 affects dir-822 firmware, dir-822 firmware. Severity is critical (CVSS 9.8). In the /HNAP1/SetQoSSettings message, the uplink parameter is vulnerable, and the vulnerability affects D-Link DIR-822 Rev.B 202KRb06 and DIR-822 Rev.C 3.10B06 devices. In the SetQoSSettings.php source code, the uplink parameter is saved in
How urgent is CVE-2018-19989?
Priority 68/100. Critical severity; EPSS top 7%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action
Software pages
PHP vulnerabilities · D-Link vulnerabilities
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