CVE-2018-11574

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-13. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 2%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

Improper input validation together with an integer overflow in the EAP-TLS protocol implementation in PPPD may cause a crash, information disclosure, or authentication bypass. This implementation is distributed as a patch for PPPD 0.91, and includes the affected eap.c and eap-tls.c files. Configurations that use the refuse-app option are unaffected.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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%
Exploitation2% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
77.5%
KEV
Not listed

Published

June 14, 2018

Last Modified

December 3, 2025

Advisory Details (1)

Auto-updated Jun 8, 2026
No patch confirmed yet.
generic

oss-security - Buffer Overflow in pppd EAP-TLS implementation

http://www.openwall.com/lists/oss-security/2018/06/11/1

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuppp-udeb (2.4.7-1+2ubuntu1.16.04.1) @ xenial2026-05-28ubuntu

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

(1)

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 14× in last 7d / 45× 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 01:32 UTCEG score recompute
  4. 2026-07-22 22:12 UTCEG score recompute
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  7. 2026-07-21 10:47 UTCOSV refresh
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  5. 2026-07-04 06:26 UTCOSV refresh
  6. 2026-07-02 16:54 UTCEPSS rescore
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  33. 2026-06-15 18:09 UTCOSV refresh
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  65. 2026-05-28 06:36 UTCEG score recompute
  66. 2026-05-28 06:36 UTCVendor advisory
  67. 2026-05-28 06:36 UTCGHSA enrichment
  68. 2026-05-27 13:38 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2018-11574?
CVE-2018-11574 is a critical vulnerability published on June 14, 2018. Improper input validation together with an integer overflow in the EAP-TLS protocol implementation in PPPD may cause a crash, information disclosure, or authentication bypass. This implementation is distributed as a patch for PPPD 0.91, and includes the affected eap.c and eap-tls.c files.…
When was CVE-2018-11574 disclosed?
CVE-2018-11574 was first published in the National Vulnerability Database on June 14, 2018, with the most recent update on December 3, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-11574 actively exploited?
CVE-2018-11574 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 77.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2018-11574?
CVE-2018-11574 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2018-11574?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-11574, 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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