How severe is CVE-2020-15835?

CVE-2020-15835 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-2020-15835 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-15835?

CVE-2020-15835 affects Mofinetwork Mofi4500-4gxelte Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-15835?

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-2020-15835 published?

CVE-2020-15835 was published on 2021-02-01 and last updated on 2026-06-17.

CVE-2020-15835

CVE-2020-15835 is a critical-severity vulnerability in Mofinetwork Mofi4500-4gxelte 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: 10.0
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Mofinetwork Mofi4500-4gxelte Firmware
Published: 2021-02-01
Last modified: 2026-06-17

Description

An issue was discovered on Mofi Network MOFI4500-4GXeLTE 4.1.5-std devices. The authentication function contains undocumented code that provides the ability to authenticate as root without knowing the actual root password. An adversary with the private key can remotely authenticate to the management interface as root.

Frequently asked questions

What is CVE-2020-15835?: An issue was discovered on Mofi Network MOFI4500-4GXeLTE 4.1.5-std devices. The authentication function contains undocumented code that provides the ability to authenticate as root without knowing the actual root password. An adversary with the private key can remotely authenticate to the management interface as root.
How severe is CVE-2020-15835?: CVE-2020-15835 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-2020-15835 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-15835?: CVE-2020-15835 affects Mofinetwork Mofi4500-4gxelte Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-15835?: 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-2020-15835 published?: CVE-2020-15835 was published on 2021-02-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:mofinetwork:mofi4500-4gxelte_firmware:4.1.5-std:*:*:*:*:*:*:*

More vulnerabilities in Mofinetwork Mofi4500-4gxelte Firmware

CVE-2020-15836 — Critical (CVSS 9.8): An issue was discovered on Mofi Network MOFI4500-4GXeLTE 4.1.5-std devices. The authentication function passes…
CVE-2020-15833 — Critical (CVSS 9.8): An issue was discovered on Mofi Network MOFI4500-4GXeLTE 4.1.5-std devices. The Dropbear SSH daemon has been modified…
CVE-2020-13859 — Critical (CVSS 9.8): An issue was discovered on Mofi Network MOFI4500-4GXeLTE 4.0.8-std devices. A format error in /etc/shadow, coupled with…
CVE-2020-13858 — Critical (CVSS 9.8): An issue was discovered on Mofi Network MOFI4500-4GXeLTE 3.6.1-std and 4.0.8-std devices. They contain two undocumented…
CVE-2020-15834 — High (CVSS 7.5): An issue was discovered on Mofi Network MOFI4500-4GXeLTE 4.1.5-std devices. The wireless network password is exposed in…
CVE-2020-15832 — High (CVSS 7.5): An issue was discovered on Mofi Network MOFI4500-4GXeLTE 4.1.5-std devices. The poof.cgi script contains undocumented…

All CVEs affecting Mofinetwork Mofi4500-4gxelte Firmware →

Other CWE-287 (Improper Authentication) vulnerabilities

CVE-2026-45480 — Critical (CVSS 10.0): Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

Browse all CWE-287 (Improper Authentication) vulnerabilities →