How severe is CVE-2020-9502?

CVE-2020-9502 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-2020-9502 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-9502?

CVE-2020-9502 primarily affects Dahuasecurity Sd6al Firmware. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-9502?

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-2020-9502 published?

CVE-2020-9502 was published on 2020-05-13 and last updated on 2026-06-17.

CVE-2020-9502

CVE-2020-9502 is a critical-severity vulnerability in Dahuasecurity Sd6al 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-330.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-330
Affected product: Dahuasecurity Sd6al Firmware
Published: 2020-05-13
Last modified: 2026-06-17

Description

Some Dahua products with Build time before December 2019 have Session ID predictable vulnerabilities. During normal user access, an attacker can use the predicted Session ID to construct a data packet to attack the device.

Frequently asked questions

What is CVE-2020-9502?: Some Dahua products with Build time before December 2019 have Session ID predictable vulnerabilities. During normal user access, an attacker can use the predicted Session ID to construct a data packet to attack the device.
How severe is CVE-2020-9502?: CVE-2020-9502 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-2020-9502 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-9502?: CVE-2020-9502 primarily affects Dahuasecurity Sd6al Firmware. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-9502?: 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-2020-9502 published?: CVE-2020-9502 was published on 2020-05-13 and last updated on 2026-06-17.

References

https://www.dahuasecurity.com/support/cybersecurity/details/777

Affected products (20)

cpe:2.3:o:dahuasecurity:sd6al_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:sd5a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:sd1a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:ptz1a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:sd50_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:sd52c_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:ipc-hx5842h_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:ipc-hx7842h_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:ipc-hx2xxx_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:ipc-hxxx5x4x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:n42b1p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:n42b2p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:n42b3p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:n52a4p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:n54a4p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:n52b2p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:n52b5p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:n52b3p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:n54b2p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:ipc-hdbw1320e-w_firmware:*:*:*:*:*:*:*:*

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