How severe is CVE-2019-20489?

CVE-2019-20489 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-2019-20489 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-20489?

CVE-2019-20489 affects Netgear Wnr1000 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-20489?

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-2019-20489 published?

CVE-2019-20489 was published on 2020-03-02 and last updated on 2026-06-17.

CVE-2019-20489

CVE-2019-20489 is a critical-severity vulnerability in Netgear Wnr1000 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-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 5.0
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Netgear Wnr1000 Firmware
Published: 2020-03-02
Last modified: 2026-06-17

Description

An issue was discovered on NETGEAR WNR1000V4 1.1.0.54 devices. The web management interface (setup.cgi) has an authentication bypass and other problems that ultimately allow an attacker to remotely compromise the device from a malicious webpage. The attacker sends an FW_remote.htm&todo=cfg_init request without a cookie, reads the Set-Cookie header in the 401 Unauthorized response, and then repeats the FW_remote.htm&todo=cfg_init request with the specified cookie.

Frequently asked questions

What is CVE-2019-20489?: An issue was discovered on NETGEAR WNR1000V4 1.1.0.54 devices. The web management interface (setup.cgi) has an authentication bypass and other problems that ultimately allow an attacker to remotely compromise the device from a malicious webpage. The attacker sends an FW_remote.htm&todo=cfg_init request without a cookie, reads the Set-Cookie header in the 401 Unauthorized response, and then repeats the FW_remote.htm&todo=cfg_init request with the specified cookie.
How severe is CVE-2019-20489?: CVE-2019-20489 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-2019-20489 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-20489?: CVE-2019-20489 affects Netgear Wnr1000 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-20489?: 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-2019-20489 published?: CVE-2019-20489 was published on 2020-03-02 and last updated on 2026-06-17.

References

https://www.nccgroup.trust/us/about-us/newsroom-and-events/blog/2019/august/the-netgear-wnr1000v4-round-2/

Affected products (1)

cpe:2.3:o:netgear:wnr1000_firmware:1.1.0.54:*:*:*:*:*:*:*

More vulnerabilities in Netgear Wnr1000 Firmware

CVE-2019-20488 — Critical (CVSS 9.8): An issue was discovered on NETGEAR WNR1000V4 1.1.0.54 devices. Multiple actions within the web management interface…
CVE-2013-3317 — Critical (CVSS 9.8): Netgear WNR1000v3 with firmware before 1.0.2.60 contains an Authentication Bypass via the NtgrBak key.
CVE-2013-3316 — Critical (CVSS 9.8): Netgear WNR1000v3 with firmware before 1.0.2.60 contains an Authentication Bypass due to the server skipping checks for…
CVE-2018-21226 — High (CVSS 8.8): Certain NETGEAR devices are affected by authentication bypass. This affects JNR1010v2 before 1.1.0.48, JWNR2010v5…
CVE-2018-21169 — High (CVSS 8.8): Certain NETGEAR devices are affected by incorrect configuration of security settings. This affects D7000 before…
CVE-2017-18703 — High (CVSS 8.8): Certain NETGEAR devices are affected by CSRF. This affects D1500 before 1.0.0.25, D500 before 1.0.0.25, D6100 before…

All CVEs affecting Netgear Wnr1000 Firmware →

Other CWE-287 (Improper Authentication) vulnerabilities

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