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01 Record

CVE-2025-7020

BYD DiLink OS Incorrect encryption Implementation of system log dumps

MediumPUBLISHEDCNA: ASRG
CNA base score5.1 CVSS v4.0CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N/AU:Y/V:D/RE:H

02 Description

BYD DiLink OS Incorrect encryption Implementation of system log dumps

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.14% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 4.0% of scored records. A rank, not a probability.
NVD base score
5.1 (CVSS v4.0), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:D/RE:H/U:X
NVD analysis status
Deferred. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2025-08-09 12:42Z1 YR AGO
Last updated
2025-08-11 15:54Z1 YR AGO
Reserved
2025-07-02
Assigning CNA
ASRG
Record state
PUBLISHED
Severity
Medium (CVSS 5.1)
CNA CVSS vector
CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N/AU:Y/V:D/RE:H
Weaknesses
  • CWE-656Reliance on Security Through ObscurityClass
Data version
5.1
Document digest
3277a0a8ce23255e6a385331cf8c3090e11dcaa63607451351298bf5a035885f

05 Affected products

VendorProductVersionsPlatforms
BYDDiLink OS13.1.32.2307211.1Dilink 3.0

06 References

07 Remediation

It is recommended to review and correct the encryption implementation used for system log dumps, ensuring the use of secure key management and proper encryption algorithm implementation practices.