How severe is CVE-2021-35520?

CVE-2021-35520 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over physical access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-35520 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-35520?

CVE-2021-35520 primarily affects Idemia Morphowave Compact Mdpi Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-35520?

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

When was CVE-2021-35520 published?

CVE-2021-35520 was published on 2021-07-22 and last updated on 2026-06-17.

CVE-2021-35520

CVE-2021-35520 is a medium-severity vulnerability in Idemia Morphowave Compact Mdpi Firmware with a CVSS 3.x base score of 6.2. 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-787.

Key facts

Severity: Medium (CVSS 3.x base score 6.2)
CVSS v2: 4.6
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Idemia Morphowave Compact Mdpi Firmware
Published: 2021-07-22
Last modified: 2026-06-17

Description

A Buffer Overflow in Thrift command handlers in IDEMIA Morpho Wave Compact and VisionPass devices before 2.6.2 allows physically proximate authenticated attackers to achieve code execution, denial of services, and information disclosure via serial ports.

Frequently asked questions

What is CVE-2021-35520?: A Buffer Overflow in Thrift command handlers in IDEMIA Morpho Wave Compact and VisionPass devices before 2.6.2 allows physically proximate authenticated attackers to achieve code execution, denial of services, and information disclosure via serial ports.
How severe is CVE-2021-35520?: CVE-2021-35520 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over physical access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-35520 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-35520?: CVE-2021-35520 primarily affects Idemia Morphowave Compact Mdpi Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-35520?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-35520 published?: CVE-2021-35520 was published on 2021-07-22 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:o:idemia:morphowave_compact_mdpi_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:idemia:morphowave_compact_mdpi-m_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:idemia:visionpass_mdpi_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:idemia:visionpass_mdpi-m_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Idemia Morphowave Compact Mdpi Firmware

CVE-2021-35522 — Critical (CVSS 9.8): A Buffer Overflow in Thrift command handlers in IDEMIA Morpho Wave Compact and VisionPass devices before 2.6.2, Sigma…
CVE-2021-35521 — Medium (CVSS 5.9): A path traversal in Thrift command handlers in IDEMIA Morpho Wave Compact and VisionPass devices before 2.6.2 allows…

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