CVE-2018-14682

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-13. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 4%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

An issue was discovered in mspack/chmd.c in libmspack before 0.7alpha. There is an off-by-one error in the TOLOWER() macro for CHM decompression.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
46(Track)
EG Risk 46/100SSVC: 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
Severity88% × 45%
Exploitation4% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
4%
EPSS %ILE
89%
KEV
Not listed

Published

July 28, 2018

Last Modified

November 21, 2024

Advisory Details (7)

Auto-updated Aug 17, 2026
Patch available. Sources: redhat, github_commit.
generic

cabextract, libmspack: Multiple vulnerabilities (GLSA 201903-20) — Gentoo security

https://security.gentoo.org/glsa/201903-20
generic

[SECURITY] [DLA-1460-1] libmspack security update

https://lists.debian.org/debian-lts-announce/2018/08/msg00007.html
github_commit

commit 4fd9ccaa54e1 (kyz/libmspack)

Fix landed in kyz/libmspack commit 4fd9ccaa54e1 — awaiting tagged release

https://github.com/kyz/libmspack/commit/4fd9ccaa54e1aebde1e4b95fb0163b699fd7bcc8
generic Patch Available

#904800 - libmspack: CVE-2018-14682: Fix off-by-one error in chmd TOLOWER() fallback - Debian Bug report logs

https://bugs.debian.org/904800
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2018:3327
generic
http://www.securitytracker.com/id/1041410
generic

oss-security - Fw: New cabextract 1.7 and libmspack 0.7 release

http://www.openwall.com/lists/oss-security/2018/07/26/1

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuclamav (0.100.2+dfsg-1ubuntu0.12.04.1) @ precise2026-05-28ubuntu
ubuntuclamav (0.100.1+dfsg-1ubuntu0.12.04.3) @ precise2026-05-28ubuntu
ubuntulibmspack0 (0.5-1ubuntu0.16.04.2) @ xenial2026-05-28ubuntu
ubuntulibclamav7 (0.100.1+dfsg-1ubuntu0.14.04.3) @ trusty2026-05-28ubuntu
ubuntulibmspack0 (0.4-1ubuntu0.1~esm2) @ trusty2026-05-28ubuntu
redhatlibmspack-0:0.5-0.6.alpha.el72018-10-30redhat

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.

Affected Packages

(21 across 15 ecosystems)
Alpine:v3.10(2)
PackageVulnerable rangeFixed inDependents
clamav0.100.0-r0 ... 0.99.4-r1 (75 versions)0.100.2-r0—
libmspack0.5_alpha-r10.7.1_alpha-r0—
Alpine:v3.11(2)
PackageVulnerable rangeFixed inDependents
clamav0.100.0-r0 ... 0.99.4-r1 (75 versions)0.100.2-r0—
libmspack0.5_alpha-r10.7.1_alpha-r0—
Alpine:v3.6(2)
PackageVulnerable rangeFixed inDependents
clamav0.100.1-r0 ... 0.99.4-r0 (65 versions)0.100.2-r0—
libmspack0.5_alpha-r10.7.1_alpha-r0—
Alpine:v3.7(2)
PackageVulnerable rangeFixed inDependents
clamav0.100.1-r0 ... 0.99.4-r0 (67 versions)0.100.2-r0—
libmspack0.5_alpha-r10.7.1_alpha-r0—
Alpine:v3.8(2)
PackageVulnerable rangeFixed inDependents
clamav0.100.0-r0 ... 0.99.4-r1 (74 versions)0.100.2-r0—
libmspack0.5_alpha-r10.7.1_alpha-r0—
Alpine:v3.9(2)
PackageVulnerable rangeFixed inDependents
clamav0.100.0-r0 ... 0.99.4-r1 (75 versions)0.100.2-r0—
libmspack0.5_alpha-r10.7.1_alpha-r0—
Alpine:v3.12(1)
PackageVulnerable rangeFixed inDependents
clamav0.100.0-r0 ... 0.99.4-r1 (75 versions)0.100.2-r0—
Alpine:v3.13(1)
PackageVulnerable rangeFixed inDependents
clamav0.100.0-r0 ... 0.99.4-r1 (75 versions)0.100.2-r0—
Alpine:v3.5(1)
PackageVulnerable rangeFixed inDependents
libmspack0.5_alpha-r10.7.1_alpha-r0—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libmspack—0.7-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libmspack—0.7-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libmspack—0.7-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libmspack—0.7-1—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
libmspack0.5-1, 0.5-1+deb8u10.5-1+deb8u2—
Debian:9(1)
PackageVulnerable rangeFixed inDependents
libmspack0.5-1, 0.5-1+deb9u10.5-1+deb9u2—

Weakness Classification(1)

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

All Vendor Advisories

(6)

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 6× in last 7d / 26× 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 125 total refreshes for this CVE.

  1. 2026-08-25 13:44 UTCEPSS rescore
  2. 2026-08-23 00:14 UTCEPSS rescore
  3. 2026-08-22 12:07 UTCOSV refresh
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  5. 2026-07-23 01:33 UTCEG score recompute
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  9. 2026-07-21 07:48 UTCOSV refresh
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Frequently asked(5)

What is CVE-2018-14682?
CVE-2018-14682 is a high vulnerability published on July 28, 2018. An issue was discovered in mspack/chmd.c in libmspack before 0.7alpha. There is an off-by-one error in the TOLOWER() macro for CHM decompression.
When was CVE-2018-14682 disclosed?
CVE-2018-14682 was first published in the National Vulnerability Database on July 28, 2018, 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-2018-14682 actively exploited?
CVE-2018-14682 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4% probability of exploitation in the next 30 days, which ranks it in the top 10.8% of all scored CVEs.
What is the CVSS score of CVE-2018-14682?
CVE-2018-14682 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2018-14682?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-14682, 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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