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NVD / CVE Program· CNA tenable

CVE-2020-5735: Amcrest cameras and NVR are vulnerable to a stack-based buffer overflow over port 37777.

Noroxi assessment

Priority: This week (action score 76/100)

  • CISA has confirmed exploitation in the wild (Nov 3, 2021). Remediation deadline for US federal agencies: May 3, 2022.
  • Probability of exploitation in the next 30 days: 36.2% (FIRST EPSS); higher than 98.4% of all records.
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Don’t wait for the next maintenance window. Until a fix is released, restrict access to the affected component and 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 · CISA KEV · FIRST EPSS

Amcrest cameras and NVR are vulnerable to a stack-based buffer overflow over port 37777. An authenticated remote attacker can abuse this issue to crash the device and possibly execute arbitrary code.

HighCVSS 8.8 · v3.1KEVWeaponized No fix recorded
Published
Apr 8, 2020
Updated
Jun 16, 2026
EPSS
36.2% · 98th percentile

Report tools

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Action score

76

This week

Don’t wait for the next maintenance window.

CVSS
35 / 40 · 8.8 / 10
CISA KEV
30 / 30 · Listed
EPSS
11 / 30 · 36.2%

CISA SSVC decision

Exploitation
active
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Nov 3, 2021. That signals real attacks, not theory.

Remediation deadline for US federal agencies: May 3, 2022.

Get told when this record changes

  • In CISA KEV: exploitation in the wild confirmed
  • Weaponized exploit exists
  • No fixed version yet

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

Follow CVE-2020-5735

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
amcrest1080-lite 8ch firmware
amcrest1080-lite 8ch
amcrestamdv10814-h5 firmware
amcrestamdv10814-h5
amcrestipm-721 firmware
amcrestipm-721
amcrestip2m-841 firmware
amcrestip2m-841
amcrestip2m-841-v3 firmware
amcrestip2m-841-v3
amcrestip2m-853ew firmware
amcrestip2m-853ew

and 24 more

Affected versions

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

  • amcrest 1080-lite 8ch firmwareall versions
  • amcrest amdv10814-h5 firmwareall versions
  • amcrest ip2m-841 firmwarebefore v2.420.ac00.18.r.20200217
  • amcrest ip2m-841-v3 firmwarebefore v2.800.0000000.6.r.200314
  • amcrest ip2m-853ew firmwarebefore v2.623.00ac004.0.r.200316
  • amcrest ip2m-858w firmwarebefore v2.623.00ac004.0.r.200316
  • amcrest ip2m-866ew firmwarebefore v2.623.00ac004.0.r.200316
  • amcrest ip2m-866w firmwarebefore v2.623.00ac004.0.r.200316
  • amcrest ip4m-1053ew firmwarebefore v2.623.00ac004.0.r.200316
  • amcrest ip8m-2454ew firmwarebefore v2.622.00ac000.0.r.200320
  • amcrest ip8m-2493eb firmwarebefore v2.622.00ac000.0.r.200320
  • amcrest ip8m-2496eb firmwarebefore v2.622.00ac000.0.r.200320
  • amcrest ip8m-2597e firmwarebefore v2.800.00ac000.0.r.200330
  • amcrest ip8m-mb2546ew firmwarebefore v2.622.00ac000.0.r.200320
  • amcrest ip8m-mt2544ew firmwarebefore v2.622.00ac000.0.r.200320
  • amcrest ip8m-t2499ew firmwarebefore v2.622.00ac000.0.r.200320
  • amcrest ipm-721 firmwarebefore v2.420.ac00.18.r.20200217
  • amcrest ipm-hx1 firmwarebefore v2.420.ac00.18.r.20200217

Versions reported by the vendor

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

  • n/a Amcrest

    • before 2.623.00AC004.0.R.200316, 2.420.AC00.18.R.20200217, 2.800.00AC000.0.R.200330, 2.800.0000000.6.R.200314.bin, 2.622.00AC000.0.R.200320.bin, and 4.000.00AC000.0.R.200218affected

Same product

amcrest: all records

Other highest-scoring records for the same primary product.

  • CVE-2020-5736Amcrest cameras and NVR are vulnerable to a null pointer dereference over port 37777.
    26Monitor

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

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Exploit-DB entry ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entrydos2020-04-08

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.

  1. First PoCsame day
  2. Published
  3. CISA KEV+574 d
  4. TodayOct 28, 2026+2394 d
EPSS, last 120 days+1% in 7 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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.
  • A low-privileged account is enough.
  • 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
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-121 · Stack-based Buffer Overflow

CVSS vector

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

nvd-primary

Attack context

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

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

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

References

Show all references (1 more)

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

All records