CVE-2020-19186

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
Elevated
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 6.5Exploit: Elevated riskExposed: 0

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

Buffer Overflow vulnerability in _nc_find_entry function in tinfo/comp_hash.c:66 in ncurses 6.1 allows remote attackers to cause a denial of service via crafted command.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: 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
Severity65% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
71%
KEV
Not listed

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

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

http://seclists.org/fulldisclosure/2023/Dec/10
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_poc2.md at master · zjuchenyuan/fuzzpoc · GitHub

https://github.com/zjuchenyuan/fuzzpoc/blob/master/infotocap_poc2.md
generic

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

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

Vendor Advisories for CVE-2020-19186(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 8× in last 7d / 42× 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 122 total refreshes for this CVE.

  1. 2026-08-11 09:01 UTCOSV refresh
  2. 2026-08-09 13:43 UTCEPSS rescore
  3. 2026-08-08 16:33 UTCEPSS rescore
  4. 2026-08-07 16:23 UTCEPSS rescore
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  17. 2026-07-26 09:41 UTCEG score recompute
  18. 2026-07-26 09:41 UTCGHSA enrichment
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  24. 2026-07-23 01:50 UTCEG score recompute
  25. 2026-07-22 22:36 UTCEG score recompute
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  66. 2026-06-09 22:47 UTCOSV refresh
  67. 2026-06-08 14:15 UTCEPSS rescore
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Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2020-19186?
CVE-2020-19186 is a medium vulnerability published on August 22, 2023. Buffer Overflow vulnerability in ncfindentry function in tinfo/comphash.c:66 in ncurses 6.1 allows remote attackers to cause a denial of service via crafted command.
When was CVE-2020-19186 disclosed?
CVE-2020-19186 was first published in the National Vulnerability Database 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-2020-19186 actively exploited?
CVE-2020-19186 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 28.7% of all scored CVEs.
What is the CVSS score of CVE-2020-19186?
CVE-2020-19186 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2020-19186?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-19186, 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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