CVE & CISA-KEV Catalog

CVE-2021-33045

CRITICALCISA KEVEPSS 100th pctl
9.8
CVSS v3
NVD

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.

CWE-287Improper Authentication

How to fix

Remediation Available
ipc-hum7xxx firmwareNVD
Affected:< 2.820.0000000.5.r.210705Fixed in:2.820.0000000.5.r.210705CVE-2021-33045derived from NVD
ipc-hx3xxx firmwareNVD
Affected:< 2.800.0000000.29.r.210630Fixed in:2.800.0000000.29.r.210630CVE-2021-33045derived from NVD
ipc-hx5xxx firmwareNVD
Affected:< 2.820.0000000.5.r.210705Fixed in:2.820.0000000.5.r.210705CVE-2021-33045derived from NVD
nvr-1xxx firmwareNVD
Affected:< 4.001.0000005.1.r.210709Fixed in:4.001.0000005.1.r.210709CVE-2021-33045derived from NVD
nvr-2xxx firmwareNVD
Affected:< 4.001.0000000.1.r.210710Fixed in:4.001.0000000.1.r.210710CVE-2021-33045derived from NVD
nvr-4xxx firmwareNVD
Affected:< 4.001.0000005.1.r.210713Fixed in:4.001.0000005.1.r.210713CVE-2021-33045derived from NVD
nvr-5xxx firmwareNVD
Affected:< 4.001.0000000.0.r.210710Fixed in:4.001.0000000.0.r.210710CVE-2021-33045derived from NVD
nvr-6xx firmwareNVD
Affected:< 4.001.0000001.1.r.210716Fixed in:4.001.0000001.1.r.210716CVE-2021-33045derived from NVD
vth-542xh firmwareNVD
Affected:< 4.500.0000002.0.r.210715Fixed in:4.500.0000002.0.r.210715CVE-2021-33045derived from NVD
vto-65xxx firmwareNVD
Affected:< 4.300.0000004.0.r.210715Fixed in:4.300.0000004.0.r.210715CVE-2021-33045derived from NVD
vto-75x95x firmwareNVD
Affected:< 4.300.0000003.0.r.210714Fixed in:4.300.0000003.0.r.210714CVE-2021-33045derived from NVD
xvr-4x04 firmwareNVD
Affected:< 4.001.0000001.1.r.210709Fixed in:4.001.0000001.1.r.210709CVE-2021-33045derived from NVD
xvr-4x08 firmwareNVD
Affected:< 4.001.0000001.1.r.210709Fixed in:4.001.0000001.1.r.210709CVE-2021-33045derived from NVD
xvr-5x04 firmwareNVD
Affected:< 4.001.0000003.1.r.210710Fixed in:4.001.0000003.1.r.210710CVE-2021-33045derived from NVD
xvr-5x08 firmwareNVD
Affected:< 4.001.0000003.1.r.210710Fixed in:4.001.0000003.1.r.210710CVE-2021-33045derived from NVD
xvr-5x16 firmwareNVD
Affected:< 4.001.0000003.1.r.210710Fixed in:4.001.0000003.1.r.210710CVE-2021-33045derived from NVD
xvr-7x16 firmwareNVD
Affected:< 4.001.0000003.1.r.210710Fixed in:4.001.0000003.1.r.210710CVE-2021-33045derived from NVD
xvr-7x32 firmwareNVD
Affected:< 4.001.0000003.1.r.210710Fixed in:4.001.0000003.1.r.210710CVE-2021-33045derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

99.56%probability of exploitation in 30 days
100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Dahua IP Camera Authentication Bypass Vulnerability

Dahua IP cameras and related products contain an authentication bypass vulnerability when the loopback device is specified by the client during authentication.

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Remediation due: 2024-09-11

References

Vendor Advisory1
Government Resource1

Related Vulnerabilities

Other CWE-287 (Improper Authentication) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2023-35082Critical9.8100%KEV + RansomFix
CVE-2023-35078Critical9.8100%KEV + RansomFix
CVE-2017-7921Critical9.8100%KEV-
CVE-2024-7593Critical9.8100%KEV-
CVE-2023-46805High8.2100%KEV + Ransom-
CVE-2022-40684Critical9.8100%KEV + RansomFix
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-01-13.