CVE-2021-39990: huawei harmonyos Out-of-bounds Write
CVSS: 9.8v3.1CriticalModified
Published 03-01-2022Last modified 22-05-2025
Vulnerability summary
CVE-2021-39990 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in huawei harmonyos. EPSS estimates a 0.75% chance of exploitation in the next 30 days, higher than 54.4% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)EPSS score
0.75%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 03-01-2022PublishedVulnerability first disclosed.
- 22-05-2025Last modifiedVulnerability information updated.
Description
The screen lock module has a Stack-based Buffer Overflow vulnerability.Successful exploitation of this vulnerability may affect user experience.
CVSS metrics
3 scores · 2 sources · 2 versionsCritical 9.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 2 agree
- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
0.75%
Chance of exploitation in the next 30 days
Percentile
54%
Versus all other CVEs
30-day change
0.00 pp
From 0.75% on 21-09-2026
21-09-202621-10-2026
EPSS score0.75%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Huawei1 product
- harmonyos2.0 | < 2.0
1 vendor · 1 product
References
1 links- device.harmonyos.com/en/docs/security/update/security-bulletins-202111-0000001217889667X Refsource MISCVendor Advisory