CVE-2021-25681
CVSS v3
7.5
HIGH
EPSS Score
10.9 %
exploit probability, as of 2026-10-05
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
AdTran Personal Phone Manager 10.8.1 software is vulnerable to an issue that allows for exfiltration of data over DNS. This could allow for exposed AdTran Personal Phone Manager web servers to be used as DNS redirectors to tunnel arbitrary data over DNS. NOTE: The affected appliances NetVanta 7060 and NetVanta 7100 are considered End of Life and as such this issue will not be patched
Technical details
- Published
- 2021-04-20
- Exploit-DB
- EDB-49787
Frequently asked questions
What is CVE-2021-25681?
AdTran Personal Phone Manager 10.8.1 software is vulnerable to an issue that allows for exfiltration of data over DNS. This could allow for exposed AdTran Personal Phone Manager web servers to be used as DNS redirectors to tunnel arbitrary data over DNS. NOTE: The affected appliances NetVanta 7060 and NetVanta 7100 are considered End of Life and as such this issue will not be patched
Is CVE-2021-25681 actively exploited?
Active exploitation of CVE-2021-25681 has not been confirmed. Its EPSS score was 10.9% on 2026-10-05, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-25681?
CVE-2021-25681 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2021-25681 affecting your environment?
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