CVE-2021-25681: n/a vulnerability

CVE-2021-25681: AdTran Personal Phone Manager 10.8.1 software is vulnerable to an issue that allows for exfiltration of dat...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedJul 9, 2026, 00:12 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2021-25681 affects AdTran Personal Phone Manager 10.8.1 on EOL NetVanta 7060 and 7100 appliances. Exposed web servers could be abused to tunnel data over DNS, creating a data exfiltration path. Sources state the affected appliances are end-of-life and will not be patched. Organizations with internet-exposed AdTran Personal Phone Manager 10.8.1 web interfaces, especially on NetVanta 7060 or 7100 appliances, are the likely exposure group. Internal-only systems still present risk if reachable by untrusted users or compromised hosts. Prioritize identifying and isolating affected EOL systems. The main business issue is an unpatched data-exfiltration path on legacy phone-management infrastructure. Replacement or decommissioning should be planned if these appliances remain in use. Mitigation focus: Identify any NetVanta 7060 or 7100 appliances running Personal Phone Manager 10.8.1.; Remove exposed Personal Phone Manager interfaces from the internet.; Restrict management access to trusted networks or VPN only..

Prepared: Jul 11, 2026, 12:12 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Apr 20, 2021, 11:17 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

3Timeline events

1ADP providers

2Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
Jan 21, 2021, 00:00 UTC (UTC+00:00)
CVE publishedCVE Program
The CVE record was published.
Apr 20, 2021, 11:17 UTC (UTC+00:00)
CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
Jul 9, 2026, 00:12 UTC (UTC+00:00)

ADP provider summaries

Source materials

CVE List V5 sourceCVE List V5
https://github.com/3ndG4me/AdTran-Personal-Phone-Manager-Vulns/blob/main/CVE-2021-25681.mdCVE reference, mitre

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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