CVE-2021-42849: lenovo a1_firmware Use of Hard-coded Credentials
Modified
Published 18-05-2022Last modified 04-08-2024
Vulnerability summary
CVE-2021-42849 is a medium (CVSS 6.8) Use of Hard-coded Credentials vulnerability in lenovo a1_firmware. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 13.3% of scored vulnerabilities.
CVSS score
6.8/10
010
Medium · v3.1 (CVE.org)EPSS score
0.23%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded
Timeline
- 18-05-2022PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
A weak default password for the serial port was reported in some Lenovo Personal Cloud Storage devices that could allow unauthorized device access to an attacker with physical access.
CVSS metrics
3 scores · 2 sources · 2 versionsMedium 6.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 2 agree
- NVDNIST6.8MediumCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Medium 4.6Preferred score · NVD (NIST)
AV:L/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
0.23%
Chance of exploitation in the next 30 days
Percentile
13%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.23% on 22-09-2026
22-09-202622-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Lenovo10 products
- a1_firmware< 5.3.6.a1
- personal cloud storage a1≥ unspecified, < 5.3.6.a1
- personal cloud storage t1≥ unspecified, < 5.3.6.t1
- personal cloud storage t2≥ unspecified, < 5.3.8.t2
- personal cloud storage t2pro≥ unspecified, < 5.3.7.t2-pro
1 vendor · 10 products