How severe is CVE-2019-10891?

CVE-2019-10891 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-2019-10891 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 19% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-10891?

CVE-2019-10891 affects Dlink Dir-806 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-10891?

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-2019-10891 published?

CVE-2019-10891 was published on 2019-09-06 and last updated on 2026-06-17.

CVE-2019-10891

CVE-2019-10891 is a critical-severity vulnerability in Dlink Dir-806 Firmware with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 19% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 19% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Dlink Dir-806 Firmware
Published: 2019-09-06
Last modified: 2026-06-17

Description

An issue was discovered in D-Link DIR-806 devices. There is a command injection in function hnap_main, which calls system() without checking the parameter that can be controlled by user, and finally allows remote attackers to execute arbitrary shell commands with a special HTTP header.

Frequently asked questions

What is CVE-2019-10891?: An issue was discovered in D-Link DIR-806 devices. There is a command injection in function hnap_main, which calls system() without checking the parameter that can be controlled by user, and finally allows remote attackers to execute arbitrary shell commands with a special HTTP header.
How severe is CVE-2019-10891?: CVE-2019-10891 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-2019-10891 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 19% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-10891?: CVE-2019-10891 affects Dlink Dir-806 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-10891?: 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-2019-10891 published?: CVE-2019-10891 was published on 2019-09-06 and last updated on 2026-06-17.

References

Affected products (1)

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

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-2023-43128 — 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-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 →

Other CWE-78 (OS Command Injection) vulnerabilities

CVE-2026-56004 — Critical (CVSS 10.0): A shellcode injection in the mercurial handler of the obs tar_scm source service before version 0.12.4 could be used by…
CVE-2026-56415 — Critical (CVSS 10.0): Storage Concentrator (SC & SCVM) contains a command injection vulnerability within the debug.pl script that is…
CVE-2026-56413 — Critical (CVSS 10.0): Storage Concentrator (SC & SCVM) contains a command injection vulnerability in the ms_service.pl service, which listens…
CVE-2026-49869 — Critical (CVSS 10.0): Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, AuthenticationFilter in…
CVE-2026-49261 — Critical (CVSS 10.0): MariaDB server is a community developed fork of MySQL server. Versions 10.6.1 through 10.6.26, 10.11.1 through…
CVE-2026-10520 — Critical (CVSS 10.0): An OS Command Injection vulnerability in Ivanti Sentry before the R10.5.2, R10.6.2 and R10.7.1 versions allows a…

Browse all CWE-78 (OS Command Injection) vulnerabilities →