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.

Published: 2021-07-22 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-35520 is rated Low Risk (32.9/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.09%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-35520

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 0.18% 0.09% -0.09%
2 2025-03-29 0.06% 0.18% +0.12%
3 2023-03-07 — 0.06% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-35520

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.2 3.1 MEDIUM
CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:P)
Hands-on access—USB, keyboard, opening the case—not something you do purely over the wire.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 0.3 5.9 [email protected]
4.6 2.0 MEDIUM
AV:L/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 3.9 6.4 [email protected]

Weakness enumeration for CVE-2021-35520

Affected software / configurations for CVE-2021-35520

Vendor Product Version Raw CPE
idemia morphowave_compact_mdpi_firmware < 2.6.2 cpe:2.3:o:idemia:morphowave_compact_mdpi_firmware:*:*:*:*:*:*:*:*
idemia morphowave_compact_mdpi-m_firmware < 2.6.2 cpe:2.3:o:idemia:morphowave_compact_mdpi-m_firmware:*:*:*:*:*:*:*:*
idemia visionpass_mdpi_firmware < 2.6.2 cpe:2.3:o:idemia:visionpass_mdpi_firmware:*:*:*:*:*:*:*:*
idemia visionpass_mdpi-m_firmware < 2.6.2 cpe:2.3:o:idemia:visionpass_mdpi-m_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-35520

cvelogic Threat Intelligence