How severe is CVE-2021-33045?

CVE-2021-33045 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-2021-33045 being actively exploited?

Yes. CVE-2021-33045 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2024-08-21, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2021-33045?

CVE-2021-33045 primarily affects Dahuasecurity Ipc-hum7xxx Firmware. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-33045?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2021-33045 have an EU (EUVD) identifier?

Yes. CVE-2021-33045 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-19760. It is also flagged as exploited in the EUVD (since 2024-08-21).

When was CVE-2021-33045 published?

CVE-2021-33045 was published on 2021-09-15 and last updated on 2026-06-17.

CVE-2021-33045

CVE-2021-33045 is a critical-severity vulnerability in Dahuasecurity Ipc-hum7xxx Firmware with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2024-08-21). The underlying weakness is classified as CWE-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 100% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2024-08-21)
EU (EUVD) id: EUVD-2021-19760
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2024-08-21)
Weakness: CWE-287
Affected product: Dahuasecurity Ipc-hum7xxx Firmware
Published: 2021-09-15
Last modified: 2026-06-17

Description

The identity authentication bypass vulnerability found in some Dahua products during the login process. Attackers can bypass device identity authentication by constructing malicious data packets.

Frequently asked questions

What is CVE-2021-33045?: The identity authentication bypass vulnerability found in some Dahua products during the login process. Attackers can bypass device identity authentication by constructing malicious data packets.
How severe is CVE-2021-33045?: CVE-2021-33045 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-2021-33045 being actively exploited?: Yes. CVE-2021-33045 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2024-08-21, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2021-33045?: CVE-2021-33045 primarily affects Dahuasecurity Ipc-hum7xxx Firmware. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-33045?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2021-33045 have an EU (EUVD) identifier?: Yes. CVE-2021-33045 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-19760. It is also flagged as exploited in the EUVD (since 2024-08-21).
When was CVE-2021-33045 published?: CVE-2021-33045 was published on 2021-09-15 and last updated on 2026-06-17.

References

Affected products (19)

cpe:2.3:o:dahuasecurity:ipc-hum7xxx_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:ipc-hx3xxx_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:ipc-hx5xxx_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:nvr-1xxx_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:nvr-2xxx_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:nvr-4xxx_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:nvr-5xxx_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:nvr-6xx_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:vth-542xh_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:vto-65xxx_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:vto-75x95x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:xvr-4x04_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:xvr-4x08_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:xvr-4x04_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:xvr-5x04_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:xvr-5x08_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:xvr-5x16_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:xvr-7x16_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:xvr-7x32_firmware:*:*:*:*:*:*:*:*

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