CVE-2020-10824

CRITICALNVD 9.89.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 9.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-24. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Elevated

Also known asEUVD-2020-3230 (ENISA EUVD) · GHSA-f823-pj2c-vwwf (GitHub Security Advisories)Source: ENISA EUVD

9.8EG
EchelonGraph verdictPlan mitigationNo fix on record since 2020: if the vendor still supports the product, apply the fixed version it names within your standard update timelines at low or medium mission impact and sooner than that at high; if it no longer does, isolate the affected system on your normal schedule at low or medium mission impact and sooner than that at high, or retire the product (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 4.1%CVSS: 9.8Exploit: No code on recordExposed services: Not assessed

No fix has been recorded since the CVE record was published in 2020 — if the vendor still supports the product, apply the fixed version it names; if not, isolate the affected system (restrict network access to it, for example with a firewall, or keep it off the internet) or retire the product.

The CVE record's description, written by its CNA (MITRE Corporation), states the affected versions: "A stack-based buffer overflow in /cgi-bin/activate.cgi through ticket parameter on Draytek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1 allows remote attackers to achieve code execution via a remote HTTP req…" No release containing a fix is confirmed on record.

A stack-based buffer overflow in /cgi-bin/activate.cgi through ticket parameter on Draytek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1 allows remote attackers to achieve code execution via a remote HTTP request (issue 2 of 3).

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
75
EG Risk 75/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity98% × 45%
Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix has been recorded since the CVE record was published in 2020. If the vendor still supports the product, apply the fixed version it names within your standard update timelines at low or medium mission impact and sooner than that at high; if it no longer does, isolate the affected system (restrict network access to it, for example with a firewall, or keep it off the internet) on your normal schedule at low or medium mission impact and sooner than that at high, or retire the product.
EPSS PROB
4.1%
EPSS %ILE
90th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.

EG Severity
9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
4.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track* at medium mission impactTrack at low, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

No fix has been recorded since the CVE record was published in 2020. If the vendor still supports the product, apply the fixed version it names within your standard update timelines at low or medium mission impact and sooner than that at high; if it no longer does, isolate the affected system (restrict network access to it, for example with a firewall, or keep it off the internet) on your normal schedule at low or medium mission impact and sooner than that at high, or retire the product.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

March 26, 2020

Last Modified

May 5, 2025

Advisory Details (1)

Auto-updated Oct 10, 2026
No fix on record since 2020.
Web page

Vigor3900 / Vigor2960 / Vigor300B Stack-based buffer overflow Vulnerability (CVE-2020-10823 ~ CVE-2020-10828) | DrayTek

https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-stack-based-buffer-overflow-vulnerability/

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 56× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 249 rows on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 149 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:38 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  2. 2026-11-12 21:04 UTCEchelonGraph re-scored
  3. 2026-11-12 21:04 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  4. 2026-11-12 16:29 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  5. 2026-11-11 19:55 UTCEchelonGraph re-scored
  6. 2026-11-11 19:55 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  7. 2026-11-11 16:30 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  8. 2026-11-10 18:47 UTCEchelonGraph re-scored
  9. 2026-11-10 18:47 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  10. 2026-11-10 16:34 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  11. 2026-11-09 17:37 UTCEchelonGraph re-scored
  12. 2026-11-09 17:37 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  13. 2026-11-09 16:28 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  14. 2026-11-08 16:31 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  15. 2026-11-08 16:28 UTCEchelonGraph re-scored
  16. 2026-11-08 16:28 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  17. 2026-11-07 16:32 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  18. 2026-11-07 15:16 UTCEchelonGraph re-scored
  19. 2026-11-07 15:16 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  20. 2026-11-06 16:29 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  21. 2026-11-06 14:08 UTCEchelonGraph re-scored
  22. 2026-11-06 14:08 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  23. 2026-11-05 16:29 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  24. 2026-11-05 12:58 UTCEchelonGraph re-scored
  25. 2026-11-05 12:58 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
Show 75 more
  1. 2026-11-04 16:29 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  2. 2026-11-04 11:49 UTCEchelonGraph re-scored
  3. 2026-11-04 11:49 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  4. 2026-11-03 16:36 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  5. 2026-11-03 10:40 UTCEchelonGraph re-scored
  6. 2026-11-03 10:40 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  7. 2026-11-02 09:31 UTCEchelonGraph re-scored
  8. 2026-11-02 09:31 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  9. 2026-11-01 08:22 UTCEchelonGraph re-scored
  10. 2026-11-01 08:22 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  11. 2026-10-31 16:28 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  12. 2026-10-31 07:13 UTCEchelonGraph re-scored
  13. 2026-10-31 07:13 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  14. 2026-10-30 16:29 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  15. 2026-10-30 06:03 UTCEchelonGraph re-scored
  16. 2026-10-30 06:03 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  17. 2026-10-29 16:28 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  18. 2026-10-29 04:54 UTCEchelonGraph re-scored
  19. 2026-10-29 04:54 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  20. 2026-10-28 16:27 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  21. 2026-10-28 03:46 UTCEchelonGraph re-scored
  22. 2026-10-28 03:45 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  23. 2026-10-27 16:27 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  24. 2026-10-27 02:24 UTCEchelonGraph re-scored
  25. 2026-10-27 02:24 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  26. 2026-10-26 16:27 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  27. 2026-10-25 21:11 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  28. 2026-10-25 18:53 UTCEchelonGraph re-scored
  29. 2026-10-25 16:28 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  30. 2026-10-24 20:03 UTCEchelonGraph re-scored
  31. 2026-10-24 20:03 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  32. 2026-10-24 16:28 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  33. 2026-10-23 18:54 UTCEchelonGraph re-scored
  34. 2026-10-23 18:54 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  35. 2026-10-23 16:27 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  36. 2026-10-22 17:45 UTCEchelonGraph re-scored
  37. 2026-10-22 17:45 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  38. 2026-10-22 16:28 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  39. 2026-10-21 16:34 UTCEchelonGraph re-scored
  40. 2026-10-21 16:34 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  41. 2026-10-21 16:28 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  42. 2026-10-20 16:28 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  43. 2026-10-20 15:21 UTCEchelonGraph re-scored
  44. 2026-10-20 15:21 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  45. 2026-10-19 16:27 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  46. 2026-10-19 14:12 UTCEchelonGraph re-scored
  47. 2026-10-19 14:12 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  48. 2026-10-18 16:28 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  49. 2026-10-18 13:01 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  50. 2026-10-18 09:37 UTCEchelonGraph re-scored
  51. 2026-10-17 16:28 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  52. 2026-10-17 11:52 UTCEchelonGraph re-scored
  53. 2026-10-17 11:52 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  54. 2026-10-16 16:32 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  55. 2026-10-16 10:42 UTCEchelonGraph re-scored
  56. 2026-10-16 10:42 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  57. 2026-10-15 16:27 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  58. 2026-10-15 09:33 UTCEchelonGraph re-scored
  59. 2026-10-15 09:32 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  60. 2026-10-14 16:28 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  61. 2026-10-14 05:48 UTCEchelonGraph re-scored
  62. 2026-10-14 05:48 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  63. 2026-10-13 16:28 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  64. 2026-10-13 01:01 UTCGHSA enrichmentGHSA-f823-pj2c-vwwf · GitHub severity HIGH · GitHub CVSS 9.8
  65. 2026-10-12 19:48 UTCEchelonGraph re-scored
  66. 2026-10-12 16:29 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  67. 2026-10-12 00:12 UTCEchelonGraph re-scored
  68. 2026-10-11 13:42 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  69. 2026-10-10 19:56 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  70. 2026-10-09 20:03 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  71. 2026-10-08 16:38 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  72. 2026-10-07 23:43 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  73. 2026-10-06 15:13 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  74. 2026-10-05 17:39 UTCEPSS rescoreEPSS 4.1% · 90th percentile
  75. 2026-10-04 23:18 UTCEPSS rescoreEPSS 4.1% · 90th percentile

Frequently asked(5)

What is CVE-2020-10824?
CVE-2020-10824 is a critical-severity vulnerability; its CVE record was published on March 26, 2020. A stack-based buffer overflow in /cgi-bin/activate.cgi through ticket parameter on Draytek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1 allows remote attackers to achieve code execution via a remote HTTP request (issue 2 of 3).
When was the CVE record for CVE-2020-10824 published?
The CVE record for CVE-2020-10824 was published on March 26, 2020. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of May 5, 2025; the record at its source may have been updated since.
Is CVE-2020-10824 actively exploited?
CVE-2020-10824 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4.1% probability of exploitation in the next 30 days (90th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2020-10824?
CVE-2020-10824 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2020-10824?
No fix for CVE-2020-10824 has been recorded since its CVE record was published in 2020. If the vendor still supports the product, apply the fixed version it names; if it no longer does, isolate the affected system (restrict network access to it, for example with a firewall, or keep it off the internet) or retire the product. The CVE record's description, written by its CNA (MITRE Corporation), states the affected versions: "A stack-based buffer overflow in /cgi-bin/activate.cgi through ticket parameter on Draytek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1 allows remote attackers to achieve code execution via a remote HTTP req…" No release containing a fix is confirmed on record.

Dependency Blast Radius

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