CVE-2020-13799

Western Digital has identified a security vulnerability in the Replay Protected Memory Block (RPMB) protocol as specified in multiple standards for storage device interfaces, including all versions of eMMC, UFS, and NVMe. The RPMB protocol is specified by industry standards bodies and is implemented by storage devices from multiple vendors to assist host systems in securing trusted firmware. Several scenarios have been identified in which the RPMB state may be affected by an attacker without the knowledge of the trusted component that uses the RPMB feature.

Published: 2020-11-18 Last update: 2026-06-05 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-13799 is rated Low Risk (36.6/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.07%). 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-2020-13799

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 2023-03-07 0.95% 0.07% -0.88%
2 2022-04-01 1.51% 0.95% -0.56%
3 2022-02-04 — 1.51% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-13799

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.8 3.1 MEDIUM
CVSS:3.1/AV:P/AC:L/PR:N/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:N)
No account or special rights needed—anonymous or random user is enough.
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.
 0.9 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-2020-13799

GitHub Security Advisory for CVE-2020-13799

GHSA-w82c-75f7-qr29 · Severity: medium — Western Digital iNAND devices through 2020-06-03 allow Authentication Bypass via a capture-replay...

Affected software / configurations for CVE-2020-13799

Vendor Product Version Raw CPE
westerndigital inand_cl_em132_firmware <= 2020-06-03 cpe:2.3:o:westerndigital:inand_cl_em132_firmware:*:*:*:*:*:*:*:*
westerndigital inand_ix_em132_firmware <= 2020-06-03 cpe:2.3:o:westerndigital:inand_ix_em132_firmware:*:*:*:*:*:*:*:*
westerndigital inand_ix_em132_xi_firmware <= 2020-06-03 cpe:2.3:o:westerndigital:inand_ix_em132_xi_firmware:*:*:*:*:*:*:*:*
trustedfirmware op-tee <= 3.11.0 cpe:2.3:o:trustedfirmware:op-tee:*:*:*:*:*:*:*:*

References for CVE-2020-13799

cvelogic Threat Intelligence