Is CVE-2021-25680 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2021-25680, but active exploitation has not been confirmed.

Can CVE-2021-25680 be exploited remotely?

Yes. CVE-2021-25680 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-25680?

CVE-2021-25680 has a CVSS score of 6.1 (MEDIUM).

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MEDIUMPOC

CVE-2021-25680

CWE-79Published: April 20, 2021· Updated: Jul 9, 2026

6.1

CVSS v3.1

Official Description

The AdTran Personal Phone Manager software is vulnerable to multiple reflected cross-site scripting (XSS) issues. These issues impact at minimum versions 10.8.1 and below but potentially impact later versions as well since they have not previously been disclosed. Only version 10.8.1 was able to be confirmed during primary research. NOTE: The affected appliances NetVanta 7060 and NetVanta 7100 are considered End of Life and as such this issue will not be patched.

NVD Source

Technical Analysis

CVE-2021-25680 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

A proof-of-concept (PoC) exploit exists for CVE-2021-25680. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.