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TI-2021-21528 Aliases CVE-2021-46840GHSA-4ppq-669j-6f73

Out-of-bounds read in Huawei HarmonyOS

Priority MEDIUM 48CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

The HW_KEYMASTER module has an out-of-bounds access vulnerability in parameter set verification.Successful exploitation of this vulnerability may cause malicious construction of data, which results in out-of-bounds access.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0053 45th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
HuaweiHarmonyOS2.0—No fix listedCNA
HuaweiEMUI12.0.0; 11.0.1—No fix listedCNA
  • HarmonyOS VendorHuawei Affected 2.0 Fixed in — No fix listed CNA
  • EMUI VendorHuawei Affected 12.0.0; 11.0.1 Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:huawei:emui:11.0.1:*:*:*:*:*:*:*11.0.1VulnerableHuawei
cpe:2.3:o:huawei:emui:12.0.0:*:*:*:*:*:*:*12.0.0VulnerableHuawei
cpe:2.3:o:huawei:harmonyos:2.0:*:*:*:*:*:*:*2.0VulnerableHuawei
  • cpe:2.3:o:huawei:emui:11.0.1:*:*:*:*:*:*:* Versions 11.0.1 Vulnerable ·Huawei
  • cpe:2.3:o:huawei:emui:12.0.0:*:*:*:*:*:*:* Versions 12.0.0 Vulnerable ·Huawei
  • cpe:2.3:o:huawei:harmonyos:2.0:*:*:*:*:*:*:* Versions 2.0 Vulnerable ·Huawei

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-46840
  2. 2026-10-03 Alias added: GHSA-4ppq-669j-6f73

References

Advisory 2

  • TI-2021-17252 Vulnerability of writing data to an arbitrary address in the HW_KEYMASTER module. CVSS 3.1HIGH 7.5
  • TI-2022-21903 Deserialization of untrusted data in Huawei HarmonyOS CVSS 3.1CRITICAL 9.8
  • TI-2022-21900 Deserialization of untrusted data in Huawei HarmonyOS CVSS 3.1CRITICAL 9.8
  • TI-2022-21899 Deserialization of untrusted data in Huawei HarmonyOS CVSS 3.1CRITICAL 9.8
  • TI-2022-19984 Out-of-bounds read in Huawei HarmonyOS CVSS 3.1CRITICAL 9.8
  • TI-2022-19982 Out-of-bounds write in Huawei HarmonyOS CVSS 3.1CRITICAL 9.8
See all 810 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences