How severe is CVE-2021-21744?

CVE-2021-21744 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2021-21744 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21744?

CVE-2021-21744 primarily affects Zte Mf971r Firmware. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-21744?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-21744 published?

CVE-2021-21744 was published on 2021-10-20 and last updated on 2026-06-17.

CVE-2021-21744

CVE-2021-21744 is a high-severity vulnerability in Zte Mf971r Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Zte Mf971r Firmware
Published: 2021-10-20
Last modified: 2026-06-17

Description

ZTE MF971R product has a configuration file control vulnerability. An attacker could use this vulnerability to modify the configuration parameters of the device, causing some security functions of the device to be disabled.

Frequently asked questions

What is CVE-2021-21744?: ZTE MF971R product has a configuration file control vulnerability. An attacker could use this vulnerability to modify the configuration parameters of the device, causing some security functions of the device to be disabled.
How severe is CVE-2021-21744?: CVE-2021-21744 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2021-21744 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21744?: CVE-2021-21744 primarily affects Zte Mf971r Firmware. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-21744?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-21744 published?: CVE-2021-21744 was published on 2021-10-20 and last updated on 2026-06-17.

References

https://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1019764

Affected products (5)

cpe:2.3:o:zte:mf971r_firmware:v1.0.0b05:*:*:*:*:*:*:*
cpe:2.3:o:zte:mf971r_firmware:1v1.0.0b06:*:*:*:*:*:*:*
cpe:2.3:o:zte:mf971r_firmware:2v1.0.0b03:*:*:*:*:*:*:*
cpe:2.3:o:zte:mf971r_firmware:s2v1.0.0b03:*:*:*:*:*:*:*
cpe:2.3:o:zte:mf971r_firmware:sv1.0.0b05:*:*:*:*:*:*:*

More vulnerabilities in Zte Mf971r Firmware

CVE-2021-21749 — Critical (CVSS 9.8): ZTE MF971R product has two stack-based buffer overflow vulnerabilities. An attacker could exploit the vulnerabilities…
CVE-2021-21748 — Critical (CVSS 9.8): ZTE MF971R product has two stack-based buffer overflow vulnerabilities. An attacker could exploit the vulnerabilities…
CVE-2021-21747 — Medium (CVSS 6.1): ZTE MF971R product has reflective XSS vulnerability. An attacker could use the vulnerability to obtain cookie…
CVE-2021-21746 — Medium (CVSS 6.1): ZTE MF971R product has reflective XSS vulnerability. An attacker could use the vulnerability to obtain cookie…
CVE-2021-21745 — Medium (CVSS 4.3): ZTE MF971R product has a Referer authentication bypass vulnerability. Without CSRF verification, an attackercould use…
CVE-2021-21743 — Medium (CVSS 4.3): ZTE MF971R product has a CRLF injection vulnerability. An attacker could exploit the vulnerability to modify the HTTP…

All CVEs affecting Zte Mf971r Firmware →