Microsoft Knack vulnerabilities

2 CVEs affecting Microsoft Knack, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2025-54364, published 2025-08-20.

More from Microsoft.

Highest priority

Known exploited (CISA KEV) first, then by EPSS exploit probability.

• CVE-2025-54363, published 2025-08-20. Medium severity, CVSS 6.9. EPSS: 0.4% chance of exploitation in the next 30 days. Microsoft Knack 0.12.0 allows Regular expression Denial of Service (ReDoS) in the knack.introspection module. extract_full_summary_from_signature employs an inefficient regular expression pattern:…
• CVE-2025-54364, published 2025-08-20. Medium severity, CVSS 6.9. EPSS: 0.4% chance of exploitation in the next 30 days. Microsoft Knack 0.12.0 allows Regular expression Denial of Service (ReDoS) in the knack.introspection module. option_descriptions employs an inefficient regular expression pattern:…