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Vulnerability record · CVE-2021-25681 · published 20 April 2021

CVE-2021-25681: Adtran personal phone manager vulnerability

Adtran · Personal Phone Manager

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.

7.5 CVSS 3.1 High EPSS 11% · top 4.3%
7.5CVSS 3.1 base score, v2 5.0
11%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 4 tagged exploit
9 Jul 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/162280/Adtran-Personal-Phone-Manager-10.8.1-DNS-Exfiltration.html ExploitThird Party AdvisoryVDB Entry
https://github.com/3ndG4me/AdTran-Personal-Phone-Manager-Vulns/blob/main/CVE-2021-25681.md ExploitThird Party Advisory
http://packetstormsecurity.com/files/162280/Adtran-Personal-Phone-Manager-10.8.1-DNS-Exfiltration.html ExploitThird Party AdvisoryVDB Entry
https://github.com/3ndG4me/AdTran-Personal-Phone-Manager-Vulns/blob/main/CVE-2021-25681.md ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

6.1CVE-2021-25680Adtran personal phone manager cross-site scripting vulnerabilityThe AdTran Personal Phone Manager software is vulnerable to multiple reflected cross-site scripting (XSS) issues. These issues impact at minimum vers…EPSS 2.5%5.4CVE-2021-25679Adtran personal phone manager cross-site scripting vulnerabilityThe AdTran Personal Phone Manager software is vulnerable to an authenticated stored cross-site scripting (XSS) issues. These issues impact at minimum…EPSS 2.7%

Source: NIST National Vulnerability Database (record CVE-2021-25681), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.