Is CVE-2018-15688 in the CISA KEV catalog?

No. CVE-2018-15688 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-15688?

CVE-2018-15688 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2018-15688?

CVE-2018-15688 has an EPSS score of 1.68% (74th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-15688?

Upgrade network-manager on debian 11 to 1.14.4-2 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2018-15688

HIGHEPSS 74th pctl

8.8

CVSS v3

NVD

Description

A buffer overflow vulnerability in the dhcp6 client of systemd allows a malicious dhcp6 server to overwrite heap memory in systemd-networkd. Affected releases are systemd: versions up to and including 239.

CWE-120Classic Buffer Overflow

How to fix

Remediation Available

network-managerDebian

Fixed in:1.14.4-2CVE-2018-15688

network-managerUbuntu

Fixed in:1.2.6-0ubuntu0.16.04.3USN-3807-1

Fixed in:1.10.6-2ubuntu1.1USN-3807-1

systemdUbuntu

Fixed in:229-4ubuntu21.6USN-3806-1

Fixed in:237-3ubuntu10.4USN-3806-1

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 VectorAdjacent

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.68%probability of exploitation in 30 days

74thpercentile

Elevated risk: more likely to be exploited than 74% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory8

Related Vulnerabilities

Other CWE-120 (Classic Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0195	Medium	6.8	100%	-	Fix
CVE-2017-7269	Critical	9.8	100%	KEV	-
CVE-2019-11043	High	8.7	99%	KEV + Ransom	Fix
CVE-2011-4862	High	10.0	95%	-	Fix
CVE-2007-5659	High	7.8	94%	KEV	Fix
CVE-2022-3786	High	7.5	91%	-	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 2025-06-09.