CVE-2020-5735

CRITICALNVD 8.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 8.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 36%CVSS: 8.8Exploit: cisa kev · ssvc active · epss top5pct · public exploitExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.8
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
36%
EPSS %ILE
98%
KEV
⚠ Exploited

Published

April 8, 2020

Last Modified

October 31, 2025

Advisory Details (3)

Auto-updated Jun 2, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-5735
generic🟡 PoC Available

Amcrest Camera/NVR Multiple Vulnerabilities - Research Advisory | Tenable®

https://www.tenable.com/security/research/tra-2020-20
generic

Packet Storm

http://packetstormsecurity.com/files/157164/Amcrest-Dahua-NVR-Camera-IP2M-841-Denial-Of-Service.html

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 55× in last 7d / 236× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 857 total refreshes for this CVE.

  1. 2026-09-19 19:22 UTCEG score recompute
  2. 2026-09-19 19:22 UTCGHSA enrichment
  3. 2026-09-19 15:37 UTCEPSS rescore
  4. 2026-09-19 15:12 UTCGHSA enrichment
  5. 2026-09-19 11:02 UTCGHSA enrichment
  6. 2026-09-19 06:52 UTCGHSA enrichment
  7. 2026-09-19 02:42 UTCGHSA enrichment
  8. 2026-09-18 22:31 UTCEG score recompute
  9. 2026-09-18 22:31 UTCGHSA enrichment
  10. 2026-09-18 19:23 UTCEPSS rescore
  11. 2026-09-18 19:20 UTCCISA KEV update
  12. 2026-09-18 18:22 UTCGHSA enrichment
  13. 2026-09-18 14:15 UTCCISA KEV update
  14. 2026-09-18 14:12 UTCGHSA enrichment
  15. 2026-09-18 10:02 UTCGHSA enrichment
  16. 2026-09-18 05:52 UTCGHSA enrichment
  17. 2026-09-18 01:42 UTCGHSA enrichment
  18. 2026-09-17 21:32 UTCEG score recompute
  19. 2026-09-17 21:32 UTCGHSA enrichment
  20. 2026-09-17 19:22 UTCEPSS rescore
  21. 2026-09-17 17:22 UTCGHSA enrichment
  22. 2026-09-17 12:16 UTCGHSA enrichment
  23. 2026-09-17 08:06 UTCGHSA enrichment
  24. 2026-09-17 03:56 UTCGHSA enrichment
  25. 2026-09-16 23:46 UTCGHSA enrichment
Show 75 more
  1. 2026-09-16 19:36 UTCGHSA enrichment
  2. 2026-09-16 15:26 UTCEG score recompute
  3. 2026-09-16 15:26 UTCGHSA enrichment
  4. 2026-09-16 14:10 UTCCISA KEV update
  5. 2026-09-16 14:04 UTCEPSS rescore
  6. 2026-09-16 11:16 UTCGHSA enrichment
  7. 2026-09-16 07:06 UTCEG score recompute
  8. 2026-09-16 07:06 UTCGHSA enrichment
  9. 2026-09-16 02:56 UTCGHSA enrichment
  10. 2026-09-15 22:46 UTCGHSA enrichment
  11. 2026-09-15 18:35 UTCGHSA enrichment
  12. 2026-09-15 14:25 UTCGHSA enrichment
  13. 2026-09-15 10:15 UTCGHSA enrichment
  14. 2026-09-15 06:05 UTCEG score recompute
  15. 2026-09-15 06:05 UTCGHSA enrichment
  16. 2026-09-15 03:06 UTCEPSS rescore
  17. 2026-09-15 01:54 UTCGHSA enrichment
  18. 2026-09-14 21:44 UTCGHSA enrichment
  19. 2026-09-14 19:24 UTCCISA KEV update
  20. 2026-09-14 17:34 UTCGHSA enrichment
  21. 2026-09-14 13:24 UTCGHSA enrichment
  22. 2026-09-14 09:14 UTCGHSA enrichment
  23. 2026-09-14 05:04 UTCGHSA enrichment
  24. 2026-09-14 00:54 UTCGHSA enrichment
  25. 2026-09-13 20:44 UTCGHSA enrichment
  26. 2026-09-13 16:34 UTCGHSA enrichment
  27. 2026-09-13 12:24 UTCGHSA enrichment
  28. 2026-09-13 08:14 UTCGHSA enrichment
  29. 2026-09-13 04:04 UTCGHSA enrichment
  30. 2026-09-12 23:54 UTCGHSA enrichment
  31. 2026-09-12 19:44 UTCGHSA enrichment
  32. 2026-09-12 15:34 UTCEG score recompute
  33. 2026-09-12 15:34 UTCGHSA enrichment
  34. 2026-09-12 14:57 UTCEPSS rescore
  35. 2026-09-12 11:24 UTCGHSA enrichment
  36. 2026-09-12 07:14 UTCGHSA enrichment
  37. 2026-09-12 03:04 UTCGHSA enrichment
  38. 2026-09-11 22:54 UTCGHSA enrichment
  39. 2026-09-11 18:49 UTCCISA KEV update
  40. 2026-09-11 18:44 UTCEG score recompute
  41. 2026-09-11 18:44 UTCGHSA enrichment
  42. 2026-09-11 14:33 UTCGHSA enrichment
  43. 2026-09-11 10:23 UTCEG score recompute
  44. 2026-09-11 10:22 UTCGHSA enrichment
  45. 2026-09-11 06:11 UTCGHSA enrichment
  46. 2026-09-11 02:01 UTCGHSA enrichment
  47. 2026-09-10 21:51 UTCGHSA enrichment
  48. 2026-09-10 19:28 UTCCISA KEV update
  49. 2026-09-10 17:40 UTCGHSA enrichment
  50. 2026-09-10 13:30 UTCEG score recompute
  51. 2026-09-10 13:30 UTCGHSA enrichment
  52. 2026-09-10 09:20 UTCGHSA enrichment
  53. 2026-09-10 05:09 UTCGHSA enrichment
  54. 2026-09-10 00:58 UTCGHSA enrichment
  55. 2026-09-09 20:47 UTCGHSA enrichment
  56. 2026-09-09 19:08 UTCCISA KEV update
  57. 2026-09-09 16:37 UTCGHSA enrichment
  58. 2026-09-09 12:25 UTCGHSA enrichment
  59. 2026-09-09 08:14 UTCGHSA enrichment
  60. 2026-09-09 04:04 UTCGHSA enrichment
  61. 2026-09-08 23:54 UTCGHSA enrichment
  62. 2026-09-08 19:44 UTCGHSA enrichment
  63. 2026-09-08 18:54 UTCCISA KEV update
  64. 2026-09-08 15:34 UTCGHSA enrichment
  65. 2026-09-08 11:22 UTCGHSA enrichment
  66. 2026-09-08 07:12 UTCGHSA enrichment
  67. 2026-09-08 03:02 UTCGHSA enrichment
  68. 2026-09-07 22:52 UTCGHSA enrichment
  69. 2026-09-07 18:42 UTCEG score recompute
  70. 2026-09-07 18:42 UTCGHSA enrichment
  71. 2026-09-07 15:58 UTCEPSS rescore
  72. 2026-09-07 14:32 UTCGHSA enrichment
  73. 2026-09-07 10:19 UTCGHSA enrichment
  74. 2026-09-07 06:08 UTCGHSA enrichment
  75. 2026-09-07 01:58 UTCGHSA enrichment

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-48304
    First seen Apr 8, 2020

    Amcrest Dahua NVR Camera IP2M-841 - Denial of Service (PoC)

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2020-5735?
CVE-2020-5735 is a critical vulnerability published on April 8, 2020. 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.
When was CVE-2020-5735 disclosed?
CVE-2020-5735 was first published in the National Vulnerability Database on April 8, 2020, with the most recent update on October 31, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-5735 actively exploited?
Yes. CISA added CVE-2020-5735 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Amcrest Cameras and Network Video Recorder (NVR). KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2020-5735?
CVE-2020-5735 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2020-5735?
CVE-2020-5735 affects Amcrest Cameras and Network Video Recorder (NVR). The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2020-5735?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-5735, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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