How severe is CVE-2021-21722?

CVE-2021-21722 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-21722 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21722?

CVE-2021-21722 affects Zte Zxv10 B860a Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21722?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-21722 published?

CVE-2021-21722 was published on 2021-01-14 and last updated on 2026-06-17.

CVE-2021-21722

CVE-2021-21722 is a medium-severity vulnerability in Zte Zxv10 B860a Firmware with a CVSS 3.x base score of 4.4. 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-532.

Key facts

Severity: Medium (CVSS 3.x base score 4.4)
CVSS v2: 2.1
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-532
Affected product: Zte Zxv10 B860a Firmware
Published: 2021-01-14
Last modified: 2026-06-17

Description

A ZTE Smart STB is impacted by an information leak vulnerability. The device did not fully verify the log, so attackers could use this vulnerability to obtain sensitive user information for further information detection and attacks. This affects: ZXV10 B860A V2.1-T_V0032.1.1.04_jiangsuTelecom.

Frequently asked questions

What is CVE-2021-21722?: A ZTE Smart STB is impacted by an information leak vulnerability. The device did not fully verify the log, so attackers could use this vulnerability to obtain sensitive user information for further information detection and attacks. This affects: ZXV10 B860A V2.1-T_V0032.1.1.04_jiangsuTelecom.
How severe is CVE-2021-21722?: CVE-2021-21722 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-21722 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21722?: CVE-2021-21722 affects Zte Zxv10 B860a Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21722?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-21722 published?: CVE-2021-21722 was published on 2021-01-14 and last updated on 2026-06-17.

References

http://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014324

Affected products (1)

cpe:2.3:o:zte:zxv10_b860a_firmware:v2.1-t_v0032.1.1.04_jiangsutelecom:*:*:*:*:*:*:*

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