CVE-2021-25679

MEDIUMNVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

Score 5.4 from GitHub Security Advisory published 2022-05-24. NVD baseline CVSS 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 2.7%CVSS: 5.4Exploit: Elevated riskExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

The AdTran Personal Phone Manager software is vulnerable to an authenticated stored 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.

CVSS v3
5.4
EG Score
5.4MEDIUMmedium confidence
EG Risk
40
EG Risk 40/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity54% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
2.7%
EPSS %ILE
85th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

April 20, 2021

Last Modified

July 9, 2026

Advisory Details (2)

Auto-updated Jul 9, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

AdTran-Personal-Phone-Manager-Vulns/CVE-2021-25679.md at main · 3ndG4me/AdTran-Personal-Phone-Manager-Vulns · GitHub

https://github.com/3ndG4me/AdTran-Personal-Phone-Manager-Vulns/blob/main/CVE-2021-25679.md
generic

Blog | Depth Security

https://depthsecurity.com/blog/vulnerability-disclosure

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 31× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 177 total refreshes for this CVE.

  1. 2026-10-05 17:40 UTCEPSS rescore
  2. 2026-10-04 23:19 UTCEPSS rescore
  3. 2026-10-03 14:22 UTCEPSS rescore
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  6. 2026-10-01 19:46 UTCEPSS rescore
  7. 2026-09-30 15:32 UTCEG score recompute
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  9. 2026-09-29 15:15 UTCEPSS rescore
  10. 2026-09-28 13:47 UTCEPSS rescore
  11. 2026-09-27 13:41 UTCEPSS rescore
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  1. 2026-09-12 14:57 UTCEPSS rescore
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  5. 2026-09-07 15:58 UTCEPSS rescore
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  16. 2026-08-28 21:37 UTCEPSS rescore
  17. 2026-08-27 14:22 UTCEPSS rescore
  18. 2026-08-26 14:42 UTCEPSS rescore
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  22. 2026-08-21 23:46 UTCEPSS rescore
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  24. 2026-08-19 17:01 UTCEPSS rescore
  25. 2026-08-18 13:45 UTCEPSS rescore
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  27. 2026-08-16 14:53 UTCEPSS rescore
  28. 2026-08-16 02:11 UTCEPSS rescore
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  31. 2026-08-13 21:57 UTCEPSS rescore
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  40. 2026-08-04 10:34 UTCEPSS rescore
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  44. 2026-07-30 16:25 UTCEPSS rescore
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  46. 2026-07-30 01:28 UTCEPSS rescore
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  48. 2026-07-28 15:33 UTCEPSS rescore
  49. 2026-07-26 14:52 UTCEPSS rescore
  50. 2026-07-26 14:52 UTCEPSS rescore
  51. 2026-07-25 14:15 UTCEPSS rescore
  52. 2026-07-24 14:15 UTCEPSS rescore
  53. 2026-07-23 14:16 UTCEPSS rescore
  54. 2026-07-23 01:58 UTCEG score recompute
  55. 2026-07-22 22:45 UTCEG score recompute
  56. 2026-07-22 14:06 UTCEPSS rescore
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  58. 2026-07-21 15:22 UTCEPSS rescore
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  60. 2026-07-20 17:05 UTCEPSS rescore
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  64. 2026-07-18 10:02 UTCEPSS rescore
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  66. 2026-07-16 17:00 UTCEPSS rescore
  67. 2026-07-15 16:55 UTCEPSS rescore
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  69. 2026-07-15 01:58 UTCEPSS rescore
  70. 2026-07-13 22:27 UTCEPSS rescore
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  72. 2026-07-13 06:10 UTCEPSS rescore
  73. 2026-07-12 05:44 UTCEPSS rescore
  74. 2026-07-12 05:44 UTCEPSS rescore
  75. 2026-07-11 08:25 UTCEPSS rescore

Publicly available exploits

(2 references)

Working exploit code is in the public domain (1 GitHub PoC) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-49785
    First seen Apr 21, 2021

    Adtran Personal Phone Manager 10.8.1 - 'emailAddress' Stored Cross-Site Scripting (XSS)

    Open source ↗
  • GitHub PoC3ndG4me/AdTran-Personal-Phone-Manager-Vulns
    First seen Mar 3, 2021

    A repository hosting write ups for the 0 days CVE-2021-25679, CVE-2021-25680, and CVE-2021-25681

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-25679?
CVE-2021-25679 is a medium vulnerability published on April 20, 2021. The AdTran Personal Phone Manager software is vulnerable to an authenticated stored 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…
When was CVE-2021-25679 disclosed?
CVE-2021-25679 was first published on April 20, 2021, with the most recent update on July 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-25679 actively exploited?
CVE-2021-25679 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.7% probability of exploitation in the next 30 days (85th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2021-25679?
CVE-2021-25679 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2021-25679?
No fix for CVE-2021-25679 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix.

Dependency Blast Radius

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