How severe is CVE-2020-36855?

CVE-2020-36855 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2020-36855 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-36855?

CVE-2020-36855 affects Offis Dcmtk. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-36855?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2020-36855 have an EU (EUVD) identifier?

Yes. CVE-2020-36855 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-35181.

When was CVE-2020-36855 published?

CVE-2020-36855 was published on 2025-10-21 and last updated on 2026-06-17.

CVE-2020-36855

CVE-2020-36855 is a medium-severity vulnerability in Offis Dcmtk with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 4.3
CVSS v4: 1.9
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-35181
Weakness: CWE-119
Affected product: Offis Dcmtk
Published: 2025-10-21
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2020-36855?: 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.
How severe is CVE-2020-36855?: CVE-2020-36855 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2020-36855 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-36855?: CVE-2020-36855 affects Offis Dcmtk. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-36855?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2020-36855 have an EU (EUVD) identifier?: Yes. CVE-2020-36855 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-35181.
When was CVE-2020-36855 published?: CVE-2020-36855 was published on 2025-10-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:offis:dcmtk:*:*:*:*:*:*:*:*

More vulnerabilities in Offis Dcmtk

CVE-2019-1010228 — Critical (CVSS 9.8): OFFIS.de DCMTK 3.6.3 and below is affected by: Buffer Overflow. The impact is: Possible code execution and confirmed…
CVE-2024-52333 — High (CVSS 8.4): An improper array index validation vulnerability exists in the determineMinMax functionality of OFFIS DCMTK 3.6.8. A…
CVE-2024-47796 — High (CVSS 8.4): An improper array index validation vulnerability exists in the nowindow functionality of OFFIS DCMTK 3.6.8. A specially…
CVE-2024-27628 — High (CVSS 8.1): Buffer Overflow vulnerability in DCMTK v.3.6.8 allows an attacker to execute arbitrary code via the EctEnhancedCT…
CVE-2025-25475 — High (CVSS 7.5): A NULL pointer dereference in the component /libsrc/dcrleccd.cc of DCMTK v3.6.9+ DEV allows attackers to cause a Denial…
CVE-2024-28130 — High (CVSS 7.5): An incorrect type conversion vulnerability exists in the DVPSSoftcopyVOI_PList::createFromImage functionality of OFFIS…

All CVEs affecting Offis Dcmtk →

Other CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities

CVE-2026-2778 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. This vulnerability was fixed in…
CVE-2026-2776 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability…
CVE-2025-1866 — Critical (CVSS 10.0): Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in warmcat libwebsockets allows…
CVE-2022-27625 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2022-27624 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2020-11896 — Critical (CVSS 10.0): The Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling.

Browse all CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities →