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NVD / CVE Program· CNA dahua

CVE-2021-33046: Some Dahua products have access control vulnerability in the password reset process.

Noroxi assessment

Priority: Monitor (action score 39/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.3% (FIRST EPSS); higher than 71.4% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Some Dahua products have access control vulnerability in the password reset process. Attackers can exploit this vulnerability through specific deployments to reset device passwords.

CriticalCVSS 9.8 · v3.1—No exploit No fix recorded
Published
Jan 13, 2022
Updated
Jun 16, 2026
EPSS
1.3% · 71th percentile

Report tools

JSON

Action score

39

Monitor

Low priority for now.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.3%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2021-33046

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
dahuasecurityipc-hx1xxx firmware
dahuasecurityipc-hx1xxx
dahuasecurityipc-hx2xxx firmware
dahuasecurityipc-hx2xxx
dahuasecurityipc-hx3xxx firmware
dahuasecurityipc-hx3xxx
dahuasecurityipc-hx5\(4\)\(3\)xxx firmware
dahuasecurityipc-hx5\(4\)\(3\)xxx
dahuasecurityipc-hx5xxx firmware
dahuasecurityipc-hx5xxx
dahuasecuritysd1a1 firmware
dahuasecuritysd1a1

and 44 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • dahuasecurity asc2204c firmware2017-7 and later · up to 2021-7 inclusive
  • dahuasecurity hcvr7xxx firmware2017-7 and later · up to 2021-7 inclusive
  • dahuasecurity hcvr8xxx firmware2017-7 and later · up to 2021-7 inclusive
  • dahuasecurity ipc-hx1xxx firmware2017-7 and later · up to 2021-7 inclusive
  • dahuasecurity ipc-hx2xxx firmware2017-7 and later · up to 2021-7 inclusive
  • dahuasecurity ipc-hx3xxx firmware2017-7 and later · up to 2021-7 inclusive
  • dahuasecurity ipc-hx5(4)(3)xxx firmware2017-7 and later · up to 2021-7 inclusive
  • dahuasecurity ipc-hx5xxx firmware2017-7 and later · up to 2021-7 inclusive
  • dahuasecurity nvr1xxx firmware2017-7 and later · up to 2021-7 inclusive
  • dahuasecurity nvr2xxx firmware2017-7 and later · up to 2021-7 inclusive
  • dahuasecurity nvr4xxx firmware2017-7 and later · up to 2021-7 inclusive
  • dahuasecurity nvr5xxx firmware2017-7 and later · up to 2021-7 inclusive
  • dahuasecurity sd1a1 firmware2017-7 and later · up to 2021-7 inclusive
  • dahuasecurity sd22 firmware2017-7 and later · up to 2021-7 inclusive
  • dahuasecurity sd49 firmware2017-7 and later · up to 2021-7 inclusive
  • dahuasecurity sd50 firmware2017-7 and later · up to 2021-7 inclusive
  • dahuasecurity sd52c firmware2017-7 and later · up to 2021-7 inclusive
  • dahuasecurity sd6al firmware2017-7 and later · up to 2021-7 inclusive
  • dahuasecurity tpc-bf1241 firmware2017-7 and later · up to 2021-7 inclusive
  • dahuasecurity tpc-bf2221 firmware2017-7 and later · up to 2021-7 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (dahua). Independent of NVD's CPE analysis and usually ahead of it.

  • n/a Access control vulnerability found in some Dahua products

    • Dahua IP Camera devices IPC-HX3XXX, and IPC-HX5XXX, PTZ Dome Camera SD1A1, SD22, SD49, SD50, SD52C, and SD6AL, Thermal TPC-BF1241,TPC-BF2221, TPC-SD2221, VTO2101E, VTOX221E, and ASC2204C devices Buildtime between 2017/7 ~ 2021/7. NVR devices NVR4XXX, and NVR5XXX, XVR devices XVR4XXX, and XVR5XXX, HCVR devices HCVR7XXX, and HCVR8XXX devices Buildtime between 2017/1 ~ 2021/7.affected

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-287 · Improper Authentication

CVSS vector

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

nvd-primary

Root cause

Authentication is added route by route instead of being enforced in one place. When a route added later bypasses the shared middleware, the session check never runs for it.

The bug in code

The whole CWE-287 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
app.use("/admin", requireSession, adminRouter);
// Route added later skips the middlewareapp.post("/admin-api/config", updateConfig);

Fixed

ts
const admin = express.Router();admin.use(requireSession, requireRole("admin"));
admin.post("/config", updateConfig);app.use("/admin", admin);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records