How severe is CVE-2020-21452?

CVE-2020-21452 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-2020-21452 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-21452?

CVE-2020-21452 affects Uniview Isc2500-s Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-21452?

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-2020-21452 published?

CVE-2020-21452 was published on 2021-04-29 and last updated on 2026-06-17.

CVE-2020-21452

CVE-2020-21452 is a critical-severity vulnerability in Uniview Isc2500-s 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Uniview Isc2500-s Firmware
Published: 2021-04-29
Last modified: 2026-06-17

Description

An issue was discovered in uniview ISC2500-S. This is an upload vulnerability where an attacker can upload malicious code via /Interface/DevManage/EC.php?cmd=upload

Frequently asked questions

What is CVE-2020-21452?: An issue was discovered in uniview ISC2500-S. This is an upload vulnerability where an attacker can upload malicious code via /Interface/DevManage/EC.php?cmd=upload
How severe is CVE-2020-21452?: CVE-2020-21452 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-2020-21452 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-21452?: CVE-2020-21452 affects Uniview Isc2500-s Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-21452?: 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-2020-21452 published?: CVE-2020-21452 was published on 2021-04-29 and last updated on 2026-06-17.

References

https://github.com/qq1654985095/tyq

Affected products (1)

cpe:2.3:o:uniview:isc2500-s_firmware:-:*:*:*:*:*:*:*

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