CVE-2018-20450

MEDIUM

The read_MSAT function in ole.c in libxls 1.4.0 has a double free that allows attackers to cause a denial of service (application crash) via a crafted file, a different vulnerability than CVE-2017-2897.

Affects 1 product across 1 vendor.

CVSS 3.06.5
EPSS1.1%
Percentile64th
PatchPatched
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, no authentication required, requires user interaction, impact contained to the vulnerable component, no confidentiality impact, no integrity impact, full availability impact.
CWE Weakness Definitions
CWE-415: CWE-415
◆ AI Analysis — automated analysis, not human-reviewed

This vulnerability was disclosed in 2018. A medium severity vulnerability affects Libxls Project systems (CVE-2018-20450). No public exploit code is currently available. Isolate affected systems if patching is not feasible.

BSID: BS-2018-GLOBAL-128399-M • Model: rule-based-v1 • Confidence: MEDIUM

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Frequently Asked Questions
What is CVE-2018-20450?
This vulnerability was disclosed in 2018. A medium severity vulnerability affects Libxls Project systems (CVE-2018-20450). No public exploit code is currently available. Isolate affected systems if patching is not feasible.
What is the CVSS score for CVE-2018-20450?
CVE-2018-20450 has CVSS 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H. EPSS: 1.1%.
Is CVE-2018-20450 actively exploited?
No confirmed active exploitation of CVE-2018-20450 as of 2026-05-30.
How do I remediate CVE-2018-20450?
Priority: MONITOR.
What systems are affected by CVE-2018-20450?
CVE-2018-20450 affects Libxls Project Libxls.
Vulnerability Details
CVE IDCVE-2018-20450
BSIDBS-2018-GLOBAL-128399-M BreachSpider Global ID
CVSS VectorCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Published2018-12-25
Last Modified2024-11-21
ICS Relevance0%
Weakness (CWE)
CWE-415
SourceNVD
Official Description

The read_MSAT function in ole.c in libxls 1.4.0 has a double free that allows attackers to cause a denial of service (application crash) via a crafted file, a different vulnerability than CVE-2017-2897.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

Vulnerability details: The read_MSAT function in ole.c in libxls 1.4.0 has a double free that allows attackers to cause a denial of service (application crash) via a crafted file, a different vulnerability than CVE-2017-2897. CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Exploitation Likelihood: MINIMAL

Affected Products
VendorProductAffected Versions
Libxls Project Libxls 1.4.0
Remediation

No official vendor advisory link on record. See the CVE record →

Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 2851 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
AI Enrichment Record — provenance & audit hash
Modelrule-based-v1
ConfidenceMEDIUM
Enriched At2026-05-24
SHA-512 Audit Hash75c9d9868e1e61aee1e36e1180fcad03c567bf55792e599e96cc81e48a89a11a9cce5a0d208a4cd53690fc5dfdc866cb327c76637687f06b50e77714cfc67e13
Related CVEs affecting Libxls Project
CVE-2018-20452 8.8 The read_MSAT_body function in ole.c in libxls 1.4.0 has an invalid free that... CVE-2017-2910 8.8 An exploitable Out-of-bounds Write vulnerability exists in the xls_addCell fu... CVE-2017-12108 8.8 An exploitable integer overflow vulnerability exists in the xls_preparseWorkS... CVE-2017-12109 8.8 An exploitable integer overflow vulnerability exists in the xls_preparseWorkS... CVE-2017-2896 7.8 An exploitable out-of-bounds write vulnerability exists in the xls_mergedCell...
View all Libxls Project CVEs →

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