How severe is CVE-2019-16920?

CVE-2019-16920 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-2019-16920 being actively exploited?

Yes. CVE-2019-16920 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-25, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2019-16920?

CVE-2019-16920 primarily affects Dlink Dir-655 Firmware. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-16920?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2019-16920 have an EU (EUVD) identifier?

Yes. CVE-2019-16920 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-7414. It is also flagged as exploited in the EUVD (since 2022-03-25).

When was CVE-2019-16920 published?

CVE-2019-16920 was published on 2019-09-27 and last updated on 2026-06-17.

CVE-2019-16920

CVE-2019-16920 is a critical-severity vulnerability in Dlink Dir-655 Firmware with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-03-25). 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: 100% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-03-25)
EU (EUVD) id: EUVD-2019-7414
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-03-25)
Weakness: CWE-78
Affected product: Dlink Dir-655 Firmware
Published: 2019-09-27
Last modified: 2026-06-17

Description

Unauthenticated remote code execution occurs in D-Link products such as DIR-655C, DIR-866L, DIR-652, and DHP-1565. The issue occurs when the attacker sends an arbitrary input to a "PingTest" device common gateway interface that could lead to common injection. An attacker who successfully triggers the command injection could achieve full system compromise. Later, it was independently found that these are also affected: DIR-855L, DAP-1533, DIR-862L, DIR-615, DIR-835, and DIR-825.

Frequently asked questions

What is CVE-2019-16920?: Unauthenticated remote code execution occurs in D-Link products such as DIR-655C, DIR-866L, DIR-652, and DHP-1565. The issue occurs when the attacker sends an arbitrary input to a "PingTest" device common gateway interface that could lead to common injection. An attacker who successfully triggers the command injection could achieve full system compromise. Later, it was independently found that these are also affected: DIR-855L, DAP-1533, DIR-862L, DIR-615, DIR-835, and DIR-825.
How severe is CVE-2019-16920?: CVE-2019-16920 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-2019-16920 being actively exploited?: Yes. CVE-2019-16920 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-25, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2019-16920?: CVE-2019-16920 primarily affects Dlink Dir-655 Firmware. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-16920?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2019-16920 have an EU (EUVD) identifier?: Yes. CVE-2019-16920 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-7414. It is also flagged as exploited in the EUVD (since 2022-03-25).
When was CVE-2019-16920 published?: CVE-2019-16920 was published on 2019-09-27 and last updated on 2026-06-17.

References

Affected products (10)

cpe:2.3:o:dlink:dir-655_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dir-866l_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dir-652_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dhp-1565_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dir-855l_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dap-1533_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dir-862l_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dir-615_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dir-835_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dir-825_firmware:-:*:*:*:*:*:*:*

More vulnerabilities in Dlink Dir-655 Firmware

CVE-2019-13561 — Critical (CVSS 9.8): D-Link DIR-655 C devices before 3.02B05 BETA03 allow remote attackers to execute arbitrary commands via shell…
CVE-2019-13560 — Critical (CVSS 9.8): D-Link DIR-655 C devices before 3.02B05 BETA03 allow remote attackers to force a blank password via the apply_sec.cgi…
CVE-2025-6158 — High (CVSS 8.8): A vulnerability classified as critical has been found in D-Link DIR-665 1.00. This affects the function sub_AC78 of the…
CVE-2019-13563 — High (CVSS 8.8): D-Link DIR-655 C devices before 3.02B05 BETA03 allow CSRF for the entire management console.
CVE-2019-13562 — Medium (CVSS 6.1): D-Link DIR-655 C devices before 3.02B05 BETA03 allow XSS, as demonstrated by the /www/ping_response.cgi ping_ipaddr…

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