Is CVE-2018-11574 in the CISA KEV catalog?

No. CVE-2018-11574 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-11574?

CVE-2018-11574 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2018-11574?

CVE-2018-11574 has an EPSS score of 1.90% (77th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-11574?

Upgrade ppp on debian 11 to 2.4.7-2+3 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2018-11574

CRITICALEPSS 77th pctl

9.8

CVSS v3

NVD

Description

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.

CWE-20Improper Input Validation CWE-190Integer Overflow

How to fix

Remediation Available

pppDebian

Fixed in:2.4.7-2+3CVE-2018-11574

pppUbuntu

Fixed in:2.4.5-5.1ubuntu2.3USN-3810-1

Fixed in:2.4.7-1+2ubuntu1.16.04.1USN-3810-1

Fixed in:2.4.7-2+2ubuntu1.1USN-3810-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

1.90%probability of exploitation in 30 days

77thpercentile

Elevated risk: more likely to be exploited than 77% of all known CVEs.

References

Patch1

openwall.com

Third-Party Advisory1

usn.ubuntu.com

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3400	Critical	10.0	100%	KEV + Ransom	-
CVE-2021-45105	Medium	5.9	100%	-	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2018-7600	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-3452	High	7.5	100%	KEV	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-12-03.