How severe is CVE-2019-9125?

CVE-2019-9125 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-2019-9125 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-9125?

CVE-2019-9125 affects D-link Dir-878 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-9125?

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-2019-9125 published?

CVE-2019-9125 was published on 2019-02-25 and last updated on 2026-06-17.

CVE-2019-9125

CVE-2019-9125 is a critical-severity vulnerability in D-link Dir-878 Firmware with a CVSS 3.x base score of 9.8. 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: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: D-link Dir-878 Firmware
Published: 2019-02-25
Last modified: 2026-06-17

Description

An issue was discovered on D-Link DIR-878 1.12B01 devices. Because strncpy is misused, there is a stack-based buffer overflow vulnerability that does not require authentication via the HNAP_AUTH HTTP header.

Frequently asked questions

What is CVE-2019-9125?: An issue was discovered on D-Link DIR-878 1.12B01 devices. Because strncpy is misused, there is a stack-based buffer overflow vulnerability that does not require authentication via the HNAP_AUTH HTTP header.
How severe is CVE-2019-9125?: CVE-2019-9125 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-2019-9125 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-9125?: CVE-2019-9125 affects D-link Dir-878 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-9125?: 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-2019-9125 published?: CVE-2019-9125 was published on 2019-02-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:d-link:dir-878_firmware:1.12b01:*:*:*:*:*:*:*

More vulnerabilities in D-link Dir-878 Firmware

CVE-2019-9124 — Critical (CVSS 9.8): An issue was discovered on D-Link DIR-878 1.12B01 devices. At the /HNAP1 URI, an attacker can log in with a blank…
CVE-2020-15633 — High (CVSS 8.8): This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of D-Link…

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