What’s Vulnerable › Vulnerabilities

CVE-2025-66382

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-11-28 · updated 2026-10-19
• Weakness: CWE-407

Description

In libexpat through 2.7.3, a crafted file with an approximate size of 2 MiB can lead to dozens of seconds of processing time.

Affected products

• libexpat project libexpat: through 2.7.3

References

• https://github.com/libexpat/libexpat/issues/1076
• http://www.openwall.com/lists/oss-security/2025/12/02/1
• https://cert-portal.siemens.com/productcert/html/ssa-082556.html
• https://cert-portal.siemens.com/productcert/html/ssa-253495.html

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