CVE-2020-19187

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2023-08-22. NVD baseline CVSS 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1.8%CVSS: 6.5Exploit: None knownExposed services: Not assessed

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

Buffer Overflow vulnerability in fmt_entry function in progs/dump_entry.c:1100 in ncurses 6.1 allows remote attackers to cause a denial of service via crafted command.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
34
EG Risk 34/100CISA SSVC

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
Severity65% × 45%
Exploitation2% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
1.8%
EPSS %ILE
77th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 22, 2023

Last Modified

July 23, 2026

Advisory Details (8)

Auto-updated Jul 25, 2026
No patch confirmed yet.
generic

Full Disclosure: APPLE-SA-12-11-2023-6 macOS Monterey 12.7.2

http://seclists.org/fulldisclosure/2023/Dec/11
generic

About the security content of macOS Ventura 13.6.3 - Apple Support

https://support.apple.com/kb/HT214038
generic

About the security content of macOS Monterey 12.7.2 - Apple Support

https://support.apple.com/kb/HT214037
generic

About the security content of macOS Sonoma 14.2 - Apple Support

https://support.apple.com/kb/HT214036
generic

NetApp Product Security

https://security.netapp.com/advisory/ntap-20231006-0005/
generic

fuzzpoc/infotocap_poc3.md at master · zjuchenyuan/fuzzpoc · GitHub

https://github.com/zjuchenyuan/fuzzpoc/blob/master/infotocap_poc3.md
generic

Full Disclosure: APPLE-SA-12-11-2023-4 macOS Sonoma 14.2

http://seclists.org/fulldisclosure/2023/Dec/9
generic

Full Disclosure: APPLE-SA-12-11-2023-5 macOS Ventura 13.6.3

http://seclists.org/fulldisclosure/2023/Dec/10

Vendor Advisories for CVE-2020-19187(1)

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

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
ncurses—6.1+20191019-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
ncurses—6.1+20191019-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
ncurses—6.1+20191019-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
ncurses—6.1+20191019-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 29× 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 170 total refreshes for this CVE.

  1. 2026-10-03 14:22 UTCEPSS rescore
  2. 2026-10-02 16:22 UTCEPSS rescore
  3. 2026-09-30 15:14 UTCEG score recompute
  4. 2026-09-30 14:59 UTCEPSS rescore
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  16. 2026-09-16 14:04 UTCEPSS rescore
  17. 2026-09-15 20:54 UTCOSV refresh
  18. 2026-09-15 03:06 UTCEPSS rescore
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  20. 2026-09-13 16:42 UTCEPSS rescore
  21. 2026-09-12 14:56 UTCEPSS rescore
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  1. 2026-09-07 15:57 UTCEPSS rescore
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  5. 2026-09-04 05:03 UTCEPSS rescore
  6. 2026-09-02 14:08 UTCEPSS rescore
  7. 2026-09-01 03:32 UTCEPSS rescore
  8. 2026-08-30 19:14 UTCEPSS rescore
  9. 2026-08-30 01:18 UTCEPSS rescore
  10. 2026-08-27 19:47 UTCOSV refresh
  11. 2026-08-27 14:21 UTCEPSS rescore
  12. 2026-08-26 14:42 UTCEPSS rescore
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  22. 2026-08-13 21:57 UTCEPSS rescore
  23. 2026-08-12 13:47 UTCEPSS rescore
  24. 2026-08-11 09:01 UTCOSV refresh
  25. 2026-08-09 13:43 UTCEPSS rescore
  26. 2026-08-08 16:33 UTCEPSS rescore
  27. 2026-08-07 16:23 UTCEPSS rescore
  28. 2026-08-06 13:43 UTCEPSS rescore
  29. 2026-08-05 19:14 UTCEPSS rescore
  30. 2026-08-04 15:06 UTCEPSS rescore
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  38. 2026-07-27 14:06 UTCEPSS rescore
  39. 2026-07-26 14:51 UTCEPSS rescore
  40. 2026-07-26 09:41 UTCEG score recompute
  41. 2026-07-26 09:41 UTCGHSA enrichment
  42. 2026-07-25 14:15 UTCEPSS rescore
  43. 2026-07-25 14:14 UTCEPSS rescore
  44. 2026-07-24 14:14 UTCEPSS rescore
  45. 2026-07-23 14:15 UTCEPSS rescore
  46. 2026-07-23 14:15 UTCEPSS rescore
  47. 2026-07-23 01:50 UTCEG score recompute
  48. 2026-07-22 22:36 UTCEG score recompute
  49. 2026-07-22 14:05 UTCEPSS rescore
  50. 2026-07-21 15:22 UTCEPSS rescore
  51. 2026-07-21 15:22 UTCEPSS rescore
  52. 2026-07-20 17:04 UTCEPSS rescore
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  60. 2026-07-15 11:49 UTCOSV refresh
  61. 2026-07-15 01:57 UTCEPSS rescore
  62. 2026-07-13 22:27 UTCEPSS rescore
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  69. 2026-07-09 19:07 UTCEPSS rescore
  70. 2026-07-08 15:12 UTCEPSS rescore
  71. 2026-07-07 13:43 UTCEPSS rescore
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  73. 2026-07-06 16:25 UTCEPSS rescore
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  75. 2026-07-06 02:21 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2020-19187?
CVE-2020-19187 is a medium vulnerability published on August 22, 2023. Buffer Overflow vulnerability in fmtentry function in progs/dumpentry.c:1100 in ncurses 6.1 allows remote attackers to cause a denial of service via crafted command.
When was CVE-2020-19187 disclosed?
CVE-2020-19187 was first published on August 22, 2023, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-19187 actively exploited?
CVE-2020-19187 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.8% probability of exploitation in the next 30 days (77th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2020-19187?
CVE-2020-19187 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2020-19187?
No fix for CVE-2020-19187 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2020-19187 are linked in the Vendor Advisories panel on this page.

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