CVE-2021-25681

HIGH

CVSS v3.1: 7.5 · EPSS: 0.1342 (96.0 percentile)

EPSS highNetworkNo privilegesNo user interaction

Source data as of:

At a glance

Severity
HIGH
CVSS
7.5 v3.1 · NVD
EPSS
0.1342 (96.0 percentile) · FIRST.org
CISA KEV
No
Attack conditions (CVSS vector)
NetworkNo privilegesNo user interaction · Source: NVD Vector
Affected vendors
adtran
Published
2021-04-20 · Modified: 2026-07-05
References
Jump to references (3)

CVSS / EPSS / KEV

CVSS v3.1 7.5 / 10 HIGH Source: NVD
EPSS 0.1342 96.0 percentile Source: FIRST.org
CISA KEV No Source: CISA

Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources

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.

Record details

CVE ID
CVE-2021-25681
CVSS (v3.1)
7.5 (HIGH)
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Exploitability subscore
3.9
Impact subscore
3.6
EPSS
0.1342 (96.0 percentile) — 2026-07-05
CISA KEV
No
Affected vendors
adtran
Affected configurations (CPE)
1
Published
2021-04-20
Modified
2026-07-05
Status
Modified

References

Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.

Related records

Other records sharing a factual facet, for cross-reference. A descriptive neighbourhood — ordering does not imply priority and is not a recommendation.

Same affected vendor

CVE-2021-25680 MEDIUM CVSS 6.1 CVE-2021-25679 MEDIUM CVSS 5.4

Published the same year

CVE-2021-42952 CRITICAL CVSS 9.9 CVE-2021-27132 CRITICAL CVSS 9.8 CVE-2021-27715 CRITICAL CVSS 9.8 CVE-2021-28235 CRITICAL CVSS 9.8
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