CVE-2017-12109

HIGH

An exploitable integer overflow vulnerability exists in the xls_preparseWorkSheet function of libxls 1.4 when handling a MULRK record. A specially crafted XLS file can cause a memory corruption res...

Affects 1 product across 1 vendor.

CVSS 3.08.8
EPSS2.7%
Percentile86th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, no authentication required, requires user interaction, impact contained to the vulnerable component, full confidentiality impact, full integrity impact, full availability impact.
CWE Weakness Definitions
CWE-190: Integer Overflow or Wraparound

Arithmetic operation exceeds the maximum integer value, wrapping around and often leading to undersized allocations.

Related Attack Patterns (CAPEC)
CAPEC-92 Forced Integer Overflow
via CWE-190

Mapping is CWE-to-CAPEC per MITRE CAPEC 3.9.

◆ AI Analysis — automated analysis, not human-reviewed

This vulnerability was disclosed in 2018. A high severity vulnerability affects Libxls Project systems (CVE-2017-12109). No public exploit code is currently available. Isolate affected systems if patching is not feasible.

BSID: BS-2018-GLOBAL-115051-H • Model: rule-based-v1 • Confidence: MEDIUM

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Frequently Asked Questions
What is CVE-2017-12109?
This vulnerability was disclosed in 2018. A high severity vulnerability affects Libxls Project systems (CVE-2017-12109). No public exploit code is currently available. Isolate affected systems if patching is not feasible.
What is the CVSS score for CVE-2017-12109?
CVE-2017-12109 has CVSS 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS: 2.7%.
Is CVE-2017-12109 actively exploited?
No confirmed active exploitation of CVE-2017-12109 as of 2026-09-25.
How do I remediate CVE-2017-12109?
Priority: MEDIUM.
What systems are affected by CVE-2017-12109?
CVE-2017-12109 affects Libxls Project Libxls.
Vulnerability Details
CVE IDCVE-2017-12109
BSIDBS-2018-GLOBAL-115051-H BreachSpider Global ID
CVSS VectorCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published2018-04-24
Last Modified2026-06-17
ICS Relevance0%
Weakness (CWE)
Integer Overflow or Wraparound
SourceNVD
Official Description

An exploitable integer overflow vulnerability exists in the xls_preparseWorkSheet function of libxls 1.4 when handling a MULRK record. A specially crafted XLS file can cause a memory corruption resulting in remote code execution. An attacker can send malicious XLS file to trigger this vulnerability.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

Vulnerability details: An exploitable integer overflow vulnerability exists in the xls_preparseWorkSheet function of libxls 1.4 when handling a MULRK record. A specially crafted XLS file can cause a memory corruption resulting in remote code execution. An attacker can send malicious XLS file to trigger this vulnerability. CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Exploitation Likelihood: MINIMAL

Affected Products
VendorProductAffected Versions
Libxls Project Libxls 1.4
Remediation

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

Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 3096 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 Hash7627d2610cc7978019b36bc2e45e1ef0cf9e1c53e222301af91794d077ebcf686498ad9cdcf8844dc8c08de1bb9545ca871c4193a2088b367ffe8afa7759db16
Related CVEs affecting Libxls Project
CVE-2017-2910 8.8 An exploitable Out-of-bounds Write vulnerability exists in the xls_addCell fu... CVE-2018-20452 8.8 The read_MSAT_body function in ole.c in libxls 1.4.0 has an invalid free that... CVE-2017-12108 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... CVE-2017-2919 7.8 An exploitable stack based buffer overflow vulnerability exists in the xls_ge...
View all Libxls Project CVEs →

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