Medium severity · published Oct 21, 2025
CVE-2020-36855
DCMTK dcmqrscp parseQuota stack-based overflow
5.5
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 16% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DC
DCMTK ·
3.6.0; 3.6.1; 3.6.2; 3.6.3; 3.6.4; 3.6.5 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-36855
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-36855
Exploit
https://shimo.im/docs/rp3OMVMDPKtjn0km/
Permissions Required
https://vuldb.com/?ctiid.329028
Third Party Advisory
https://vuldb.com/?id.329028
Third Party Advisory
https://vuldb.com/?submit.673137
Exploit
https://shimo.im/docs/rp3OMVMDPKtjn0km/read
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