How severe is CVE-2020-6872?

CVE-2020-6872 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-6872 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-6872?

CVE-2020-6872 primarily affects Zte R8500g4 Firmware. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-6872?

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

When was CVE-2020-6872 published?

CVE-2020-6872 was published on 2020-07-20 and last updated on 2026-06-17.

CVE-2020-6872

CVE-2020-6872 is a medium-severity vulnerability in Zte R8500g4 Firmware with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Zte R8500g4 Firmware
Published: 2020-07-20
Last modified: 2026-06-17

Description

The server management software module of ZTE has a storage XSS vulnerability. The attacker inserts some attack codes through the foreground login page, which will cause the user to execute the predefined malicious script in the browser. This affects <R5300G4V03.08.0100/V03.07.0300/V03.07.0200/V03.07.0108/V03.07.0100/V03.05.0047/V03.05.0046/V03.05.0045/V03.05.0044/V03.05.0043/V03.05.0040/V03.04.0020;R8500G4V03.07.0103/V03.07.0101/V03.06.0100/V03.05.0400/V03.05.0020;R5500G4V03.08.0100/V03.07.0200/V03.07.0100/V03.06.0100>.

Frequently asked questions

What is CVE-2020-6872?: The server management software module of ZTE has a storage XSS vulnerability. The attacker inserts some attack codes through the foreground login page, which will cause the user to execute the predefined malicious script in the browser. This affects <R5300G4V03.08.0100/V03.07.0300/V03.07.0200/V03.07.0108/V03.07.0100/V03.05.0047/V03.05.0046/V03.05.0045/V03.05.0044/V03.05.0043/V03.05.0040/V03.04.0020;R8500G4V03.07.0103/V03.07.0101/V03.06.0100/V03.05.0400/V03.05.0020;R5500G4V03.08.0100/V03.07.0200/V03.07.0100/V03.06.0100>.
How severe is CVE-2020-6872?: CVE-2020-6872 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-6872 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-6872?: CVE-2020-6872 primarily affects Zte R8500g4 Firmware. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-6872?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-6872 published?: CVE-2020-6872 was published on 2020-07-20 and last updated on 2026-06-17.

References

http://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1013203

Affected products (21)

cpe:2.3:o:zte:r8500g4_firmware:03.05.0020:*:*:*:*:*:*:*
cpe:2.3:o:zte:r8500g4_firmware:03.05.0400:*:*:*:*:*:*:*
cpe:2.3:o:zte:r8500g4_firmware:03.06.0100:*:*:*:*:*:*:*
cpe:2.3:o:zte:r8500g4_firmware:03.07.0101:*:*:*:*:*:*:*
cpe:2.3:o:zte:r8500g4_firmware:03.07.0103:*:*:*:*:*:*:*
cpe:2.3:o:zte:r5500g4_firmware:03.06.0100:*:*:*:*:*:*:*
cpe:2.3:o:zte:r5500g4_firmware:03.07.0100:*:*:*:*:*:*:*
cpe:2.3:o:zte:r5500g4_firmware:03.07.0200:*:*:*:*:*:*:*
cpe:2.3:o:zte:r5500g4_firmware:03.08.0100:*:*:*:*:*:*:*
cpe:2.3:o:zte:r5300g4_firmware:03.04.0020:*:*:*:*:*:*:*
cpe:2.3:o:zte:r5300g4_firmware:03.05.0040:*:*:*:*:*:*:*
cpe:2.3:o:zte:r5300g4_firmware:03.05.0043:*:*:*:*:*:*:*
cpe:2.3:o:zte:r5300g4_firmware:03.05.0044:*:*:*:*:*:*:*
cpe:2.3:o:zte:r5300g4_firmware:03.05.0045:*:*:*:*:*:*:*
cpe:2.3:o:zte:r5300g4_firmware:03.05.0046:*:*:*:*:*:*:*
cpe:2.3:o:zte:r5300g4_firmware:03.05.0047:*:*:*:*:*:*:*
cpe:2.3:o:zte:r5300g4_firmware:03.07.0100:*:*:*:*:*:*:*
cpe:2.3:o:zte:r5300g4_firmware:03.07.0108:*:*:*:*:*:*:*
cpe:2.3:o:zte:r5300g4_firmware:03.07.0200:*:*:*:*:*:*:*
cpe:2.3:o:zte:r5300g4_firmware:03.07.0300:*:*:*:*:*:*:*
cpe:2.3:o:zte:r5300g4_firmware:03.08.0100:*:*:*:*:*:*:*

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