CVE-2020-29557

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 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 9.8 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
9.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 54%CVSS: 9.8Exploit: NoneExposed: 0

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

An issue was discovered on D-Link DIR-825 R1 devices through 3.0.1 before 2020-11-20. A buffer overflow in the web interface allows attackers to achieve pre-authentication remote code execution.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

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
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS
98.9%
KEV
⚠ Exploited

Published

January 29, 2021

Last Modified

November 7, 2025

Advisory Details (1)

Auto-updated Jun 1, 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-2020-29557

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 53× in last 7d / 211× 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 385 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2020-29557?
CVE-2020-29557 is a critical vulnerability published on January 29, 2021. An issue was discovered on D-Link DIR-825 R1 devices through 3.0.1 before 2020-11-20. A buffer overflow in the web interface allows attackers to achieve pre-authentication remote code execution.
When was CVE-2020-29557 disclosed?
CVE-2020-29557 was first published in the National Vulnerability Database on January 29, 2021, with the most recent update on November 7, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-29557 actively exploited?
Yes. CISA added CVE-2020-29557 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting D-Link DIR-825 R1 Devices. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2020-29557?
CVE-2020-29557 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2020-29557?
CVE-2020-29557 affects D-Link DIR-825 R1 Devices. 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-2020-29557?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-29557, 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.

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