What’s Vulnerable › Vulnerabilities

CVE-2020-27819

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-02-23 · updated 2026-06-17
• Weakness: CWE-476

Description

An issue was discovered in libxls before and including 1.6.1 when reading Microsoft Excel files. A NULL pointer dereference vulnerability exists when parsing XLS cells in libxls/xls2csv.c:199. It could allow a remote attacker to cause a denial of service via crafted XLS file.

Affected products

• libxls: before 1.6.2 — fixed in 1.6.2

How to fix

Upgrade to a fixed version: libxls 1.6.2. Check the vendor advisory for mitigations.

References

• https://bugzilla.redhat.com/show_bug.cgi?id=1903296
• https://bugzilla.redhat.com/show_bug.cgi?id=1903296

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