CVE-2018-16890

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2022-05-13. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 5%CVSS: 7.5Exploit: NoneExposed: 0

A fix is available — apply it.

libcurl versions from 7.36.0 to before 7.64.0 is vulnerable to a heap buffer out-of-bounds read. The function handling incoming NTLM type-2 messages (lib/vauth/ntlm.c:ntlm_decode_type2_target) does not validate incoming data correctly and is subject to an integer overflow vulnerability. Using that overflow, a malicious or broken NTLM server could trick libcurl to accept a bad length + offset combination that would lead to a buffer read out-of-bounds.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
36(Track)
EG Risk 36/100SSVC: 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
Severity75% × 45%
Exploitation5% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
91.8%
KEV
Not listed

Published

February 6, 2019

Last Modified

November 21, 2024

References (24)

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibcurl4-openssl-dev (7.35.0-1ubuntu2.20) @ trusty2026-05-27ubuntu
redhatcurl-0:7.61.1-11.el82019-11-05redhat
redhatpatch2019-06-18redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(2)

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

All Vendor Advisories

(3)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 12× in last 7d / 40× 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.

  1. 2026-07-23 14:15 UTCEPSS rescore
  2. 2026-07-23 14:15 UTCEPSS rescore
  3. 2026-07-23 01:34 UTCEG score recompute
  4. 2026-07-22 22:14 UTCEG score recompute
  5. 2026-07-22 14:04 UTCEPSS rescore
  6. 2026-07-21 15:21 UTCEPSS rescore
  7. 2026-07-20 23:02 UTCOSV refresh
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  1. 2026-07-04 06:28 UTCEPSS rescore
  2. 2026-07-03 18:26 UTCOSV refresh
  3. 2026-07-02 16:54 UTCEPSS rescore
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  5. 2026-07-01 15:03 UTCEPSS rescore
  6. 2026-06-30 23:19 UTCEPSS rescore
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  8. 2026-06-28 14:04 UTCEPSS rescore
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  24. 2026-06-17 17:50 UTCEPSS rescore
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  26. 2026-06-16 17:50 UTCEPSS rescore
  27. 2026-06-16 17:50 UTCEPSS rescore
  28. 2026-06-15 17:45 UTCEPSS rescore
  29. 2026-06-15 06:43 UTCOSV refresh
  30. 2026-06-14 23:14 UTCEPSS rescore
  31. 2026-06-14 23:14 UTCEPSS rescore
  32. 2026-06-13 22:58 UTCEPSS rescore
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  35. 2026-06-11 13:57 UTCEPSS rescore
  36. 2026-06-10 22:16 UTCEPSS rescore
  37. 2026-06-10 13:19 UTCEPSS rescore
  38. 2026-06-08 14:14 UTCEPSS rescore
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  40. 2026-06-07 15:22 UTCEPSS rescore
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  42. 2026-06-06 13:45 UTCEPSS rescore
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  44. 2026-06-05 22:45 UTCEPSS rescore
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  46. 2026-06-05 06:08 UTCEPSS rescore
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  48. 2026-06-04 13:10 UTCEPSS rescore
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  50. 2026-06-02 20:11 UTCEPSS rescore
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  59. 2026-05-28 13:42 UTCEPSS rescore
  60. 2026-05-27 22:42 UTCEG score recompute
  61. 2026-05-27 22:42 UTCVendor advisory
  62. 2026-05-27 22:42 UTCGHSA enrichment
  63. 2026-05-27 13:38 UTCEPSS rescore
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  67. 2026-05-26 07:17 UTCEPSS rescore
  68. 2026-05-26 07:17 UTCEPSS rescore

Frequently asked(5)

What is CVE-2018-16890?
CVE-2018-16890 is a high vulnerability published on February 6, 2019. libcurl versions from 7.36.0 to before 7.64.0 is vulnerable to a heap buffer out-of-bounds read. The function handling incoming NTLM type-2 messages (lib/vauth/ntlm.c:ntlmdecodetype2_target) does not validate incoming data correctly and is subject to an integer overflow vulnerability. Using that…
When was CVE-2018-16890 disclosed?
CVE-2018-16890 was first published in the National Vulnerability Database on February 6, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-16890 actively exploited?
CVE-2018-16890 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 91.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2018-16890?
CVE-2018-16890 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2018-16890?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-16890, 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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