What’s Vulnerable › Vulnerabilities

CVE-2020-36855: DCMTK dcmqrscp parseQuota stack-based overflow

• 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: yes
• Published: 2025-10-21 · updated 2026-06-17
• Weakness: CWE-119

Description

A security vulnerability has been detected in DCMTK up to 3.6.5. The affected element is the function parseQuota of the component dcmqrscp. The manipulation of the argument StorageQuota leads to stack-based buffer overflow. Local access is required to approach this attack. The exploit has been disclosed publicly and may be used. Upgrading to version 3.6.6 is sufficient to fix this issue. The identifier of the patch is 0fef9f02e. It is recommended to upgrade the affected component.

Affected products

• OFFIS DCMTK: before 3.6.6 — fixed in 3.6.6

How to fix

Upgrade to a fixed version: OFFIS DCMTK 3.6.6. Check the vendor advisory for mitigations.

References

• https://shimo.im/docs/rp3OMVMDPKtjn0km/
• https://vuldb.com/?ctiid.329028
• https://vuldb.com/?id.329028
• https://vuldb.com/?submit.673137
• https://shimo.im/docs/rp3OMVMDPKtjn0km/read

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