CVE-2021-42627

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-08-24. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 63%
CISA-KEV: Not listedEPSS PROB: 63%CVSS: 9.8Exploit: Elevated riskExposed: 0

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

The WAN configuration page "wan.htm" on D-Link DIR-615 devices with firmware 20.06 can be accessed directly without authentication which can lead to disclose the information about WAN settings and also leverage attacker to modify the data fields of page.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
74(Track*)
EG Risk 74/100SSVC: Track*

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%
Exploitation63% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
63%
EPSS %ILE
99%
KEV
Not listed

Published

August 23, 2022

Last Modified

July 9, 2026

Advisory Details (4)

Auto-updated Sep 6, 2026
No patch confirmed yet.
generic

Security Bulletin | D-Link

https://www.dlink.com/en/security-bulletin/
generic

D-Link-DIR-615/CVE-2021-42627 at main · thesanjok/D-Link-DIR-615 · GitHub

https://github.com/sanjokkarki/D-Link-DIR-615/blob/main/CVE-2021-42627
generic

Smart Home, SMB and Enterprise solutions | D-Link

http://dlink.com
generic

D-Link

http://d-link.com

Vendor Advisories for CVE-2021-42627(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Data Freshness Timeline

(refreshed 4× in last 7d / 20× 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 115 total refreshes for this CVE.

  1. 2026-09-06 13:45 UTCEPSS rescore
  2. 2026-09-05 15:25 UTCEPSS rescore
  3. 2026-09-04 05:03 UTCEPSS rescore
  4. 2026-09-02 14:09 UTCEPSS rescore
  5. 2026-09-01 13:50 UTCEPSS rescore
  6. 2026-08-30 19:14 UTCEPSS rescore
  7. 2026-08-30 19:14 UTCEPSS rescore
  8. 2026-08-30 01:19 UTCEPSS rescore
  9. 2026-08-28 21:37 UTCEPSS rescore
  10. 2026-08-26 14:43 UTCEPSS rescore
  11. 2026-08-24 14:13 UTCEPSS rescore
  12. 2026-08-23 00:16 UTCEPSS rescore
  13. 2026-08-21 23:46 UTCEPSS rescore
  14. 2026-08-20 22:52 UTCEPSS rescore
  15. 2026-08-20 22:52 UTCEPSS rescore
  16. 2026-08-19 17:01 UTCEPSS rescore
  17. 2026-08-16 02:11 UTCEPSS rescore
  18. 2026-08-15 01:27 UTCEPSS rescore
  19. 2026-08-12 13:48 UTCEPSS rescore
  20. 2026-08-11 13:38 UTCEPSS rescore
  21. 2026-08-07 16:24 UTCEPSS rescore
  22. 2026-08-05 19:14 UTCEPSS rescore
  23. 2026-08-03 10:33 UTCEPSS rescore
  24. 2026-08-01 04:13 UTCEPSS rescore
  25. 2026-07-30 16:25 UTCEPSS rescore
Show 75 more
  1. 2026-07-30 01:28 UTCEPSS rescore
  2. 2026-07-28 15:33 UTCEPSS rescore
  3. 2026-07-26 14:52 UTCEPSS rescore
  4. 2026-07-26 14:52 UTCEPSS rescore
  5. 2026-07-25 14:15 UTCEPSS rescore
  6. 2026-07-24 14:15 UTCEPSS rescore
  7. 2026-07-23 14:16 UTCEPSS rescore
  8. 2026-07-23 02:04 UTCEG score recompute
  9. 2026-07-22 22:51 UTCEG score recompute
  10. 2026-07-22 14:06 UTCEPSS rescore
  11. 2026-07-21 15:22 UTCEPSS rescore
  12. 2026-07-21 15:22 UTCEPSS rescore
  13. 2026-07-20 17:05 UTCEPSS rescore
  14. 2026-07-18 10:02 UTCEPSS rescore
  15. 2026-07-18 10:02 UTCEPSS rescore
  16. 2026-07-16 17:00 UTCEPSS rescore
  17. 2026-07-16 17:00 UTCEPSS rescore
  18. 2026-07-15 16:55 UTCEPSS rescore
  19. 2026-07-15 16:55 UTCEPSS rescore
  20. 2026-07-13 22:27 UTCEPSS rescore
  21. 2026-07-13 22:27 UTCEPSS rescore
  22. 2026-07-13 06:11 UTCEPSS rescore
  23. 2026-07-13 06:11 UTCEPSS rescore
  24. 2026-07-12 05:44 UTCEPSS rescore
  25. 2026-07-11 08:25 UTCEPSS rescore
  26. 2026-07-11 08:25 UTCEPSS rescore
  27. 2026-07-09 19:07 UTCEPSS rescore
  28. 2026-07-09 02:55 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  29. 2026-07-09 01:24 UTCMITRE cvelistV5
  30. 2026-07-07 13:43 UTCEPSS rescore
  31. 2026-07-06 16:25 UTCEPSS rescore
  32. 2026-07-06 16:25 UTCEPSS rescore
  33. 2026-07-05 17:59 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  34. 2026-07-05 16:09 UTCMITRE cvelistV5
  35. 2026-07-05 00:28 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  36. 2026-07-04 23:57 UTCMITRE cvelistV5
  37. 2026-07-04 06:29 UTCEPSS rescore
  38. 2026-07-04 06:29 UTCEPSS rescore
  39. 2026-07-01 15:04 UTCEPSS rescore
  40. 2026-06-30 23:20 UTCEPSS rescore
  41. 2026-06-30 23:20 UTCEPSS rescore
  42. 2026-06-27 03:06 UTCEPSS rescore
  43. 2026-06-27 03:06 UTCEPSS rescore
  44. 2026-06-25 13:48 UTCEPSS rescore
  45. 2026-06-25 13:48 UTCEPSS rescore
  46. 2026-06-24 14:03 UTCEPSS rescore
  47. 2026-06-24 14:03 UTCEPSS rescore
  48. 2026-06-23 21:31 UTCEPSS rescore
  49. 2026-06-23 21:31 UTCEPSS rescore
  50. 2026-06-19 19:24 UTCEPSS rescore
  51. 2026-06-19 19:24 UTCEPSS rescore
  52. 2026-06-18 17:51 UTCEPSS rescore
  53. 2026-06-18 17:51 UTCEPSS rescore
  54. 2026-06-17 17:51 UTCEPSS rescore
  55. 2026-06-17 17:51 UTCEPSS rescore
  56. 2026-06-17 17:51 UTCEPSS rescore
  57. 2026-06-16 17:51 UTCEPSS rescore
  58. 2026-06-16 17:51 UTCEPSS rescore
  59. 2026-06-15 17:46 UTCEPSS rescore
  60. 2026-06-13 22:58 UTCEPSS rescore
  61. 2026-06-13 22:58 UTCEPSS rescore
  62. 2026-06-12 23:10 UTCEPSS rescore
  63. 2026-06-11 13:58 UTCEPSS rescore
  64. 2026-06-11 13:58 UTCEPSS rescore
  65. 2026-06-10 22:16 UTCEPSS rescore
  66. 2026-06-10 22:16 UTCEPSS rescore
  67. 2026-06-10 13:20 UTCEPSS rescore
  68. 2026-06-08 14:15 UTCEPSS rescore
  69. 2026-06-08 14:15 UTCEPSS rescore
  70. 2026-06-07 15:23 UTCEPSS rescore
  71. 2026-06-07 15:23 UTCEPSS rescore
  72. 2026-06-05 22:45 UTCEPSS rescore
  73. 2026-06-05 06:09 UTCEPSS rescore
  74. 2026-06-05 06:09 UTCEPSS rescore
  75. 2026-06-04 13:10 UTCEPSS rescore

Publicly available exploits

(1 reference)

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

  • Nucleihttp/cves/2021/CVE-2021-42627.yaml
    First seen Jan 1, 2021

    D-Link DIR-615 - Unauthorized Access

    Open source ↗

Frequently asked(5)

What is CVE-2021-42627?
CVE-2021-42627 is a critical vulnerability published on August 23, 2022. The WAN configuration page "wan.htm" on D-Link DIR-615 devices with firmware 20.06 can be accessed directly without authentication which can lead to disclose the information about WAN settings and also leverage attacker to modify the data fields of page.
When was CVE-2021-42627 disclosed?
CVE-2021-42627 was first published in the National Vulnerability Database on August 23, 2022, with the most recent update on July 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-42627 actively exploited?
CVE-2021-42627 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 63% probability of exploitation in the next 30 days, which ranks it in the top 0.9% of all scored CVEs.
What is the CVSS score of CVE-2021-42627?
CVE-2021-42627 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2021-42627?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-42627, 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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