CVE-2025-20265

CRITICALNVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2025-08-14. NVD baseline CVSS 10.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
10.0
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 15%CVSS: 10.0Exploit: NoneExposed: 0

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

A vulnerability in the RADIUS subsystem implementation of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remote attacker to inject arbitrary shell commands that are executed by the device.  This vulnerability is due to a lack of proper handling of user input during the authentication phase. An attacker could exploit this vulnerability by sending crafted input when entering credentials that will be authenticated at the configured RADIUS server. A successful exploit could allow the attacker to execute commands at a high privilege level. Note: For this vulnerability to be exploited, Cisco Secure FMC Software must be configured for RADIUS authentication for the web-based management interface, SSH management, or both.

CVSS v3
10.0
EG Score
10.0(medium)
EG Risk
76(Track)
EG Risk 76/100SSVC: Track

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
Severity100% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
96.3%
KEV
Not listed

Published

August 14, 2025

Last Modified

August 16, 2025

Advisory Details (3)

Auto-updated Jul 18, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic

Max-severity Cisco firewall management bug leads to RCE

https://www.theregister.com/2025/08/15/cisco_secure_firewall_management_bug/
generic🔴 Active Exploitation

Cisco warns of max severity flaw in Firewall Management Center

https://www.bleepingcomputer.com/news/security/cisco-warns-of-max-severity-flaw-in-firewall-management-center/
generic

Cisco Secure Firewall Management Center Software RADIUS Remote Code Execution Vulnerability

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-radius-rce-TNBKf79

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 38× 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.

  1. 2026-07-24 14:16 UTCEPSS rescore
  2. 2026-07-23 14:17 UTCEPSS rescore
  3. 2026-07-23 02:49 UTCEG score recompute
  4. 2026-07-22 14:07 UTCEPSS rescore
  5. 2026-07-22 14:07 UTCEPSS rescore
  6. 2026-07-21 15:24 UTCEPSS rescore
  7. 2026-07-19 14:30 UTCEPSS rescore
  8. 2026-07-19 14:30 UTCEPSS rescore
  9. 2026-07-19 02:28 UTCEPSS rescore
  10. 2026-07-19 02:28 UTCEPSS rescore
  11. 2026-07-18 10:03 UTCEPSS rescore
  12. 2026-07-16 17:02 UTCEPSS rescore
  13. 2026-07-16 17:02 UTCEPSS rescore
  14. 2026-07-15 16:57 UTCEPSS rescore
  15. 2026-07-15 16:57 UTCEPSS rescore
  16. 2026-07-13 22:29 UTCEPSS rescore
  17. 2026-07-13 22:29 UTCEPSS rescore
  18. 2026-07-13 06:12 UTCEPSS rescore
  19. 2026-07-12 05:46 UTCEPSS rescore
  20. 2026-07-12 05:45 UTCEPSS rescore
  21. 2026-07-11 08:26 UTCEPSS rescore
  22. 2026-07-11 08:26 UTCEPSS rescore
  23. 2026-07-09 19:09 UTCEPSS rescore
  24. 2026-07-08 15:14 UTCEPSS rescore
  25. 2026-07-07 13:45 UTCEPSS rescore
Show 54 more
  1. 2026-07-06 02:22 UTCEPSS rescore
  2. 2026-07-06 02:22 UTCEPSS rescore
  3. 2026-07-05 02:30 UTCEPSS rescore
  4. 2026-07-04 06:30 UTCEPSS rescore
  5. 2026-07-01 15:06 UTCEPSS rescore
  6. 2026-06-29 14:06 UTCEPSS rescore
  7. 2026-06-28 14:07 UTCEPSS rescore
  8. 2026-06-28 14:07 UTCEPSS rescore
  9. 2026-06-28 04:55 UTCEPSS rescore
  10. 2026-06-27 03:08 UTCEPSS rescore
  11. 2026-06-27 03:08 UTCEPSS rescore
  12. 2026-06-25 13:49 UTCEPSS rescore
  13. 2026-06-25 13:49 UTCEPSS rescore
  14. 2026-06-24 14:04 UTCEPSS rescore
  15. 2026-06-24 14:04 UTCEPSS rescore
  16. 2026-06-23 21:32 UTCEPSS rescore
  17. 2026-06-21 14:56 UTCEPSS rescore
  18. 2026-06-21 14:56 UTCEPSS rescore
  19. 2026-06-19 19:25 UTCEPSS rescore
  20. 2026-06-19 19:25 UTCEPSS rescore
  21. 2026-06-18 17:52 UTCEPSS rescore
  22. 2026-06-18 17:52 UTCEPSS rescore
  23. 2026-06-17 17:52 UTCEPSS rescore
  24. 2026-06-16 17:52 UTCEPSS rescore
  25. 2026-06-15 17:48 UTCEPSS rescore
  26. 2026-06-14 23:17 UTCEPSS rescore
  27. 2026-06-13 22:59 UTCEPSS rescore
  28. 2026-06-13 22:59 UTCEPSS rescore
  29. 2026-06-12 23:11 UTCEPSS rescore
  30. 2026-06-11 13:59 UTCEPSS rescore
  31. 2026-06-10 22:18 UTCEPSS rescore
  32. 2026-06-10 13:21 UTCEPSS rescore
  33. 2026-06-08 14:16 UTCEPSS rescore
  34. 2026-06-08 14:16 UTCEPSS rescore
  35. 2026-06-07 15:24 UTCEPSS rescore
  36. 2026-06-06 13:47 UTCEPSS rescore
  37. 2026-06-06 13:47 UTCEPSS rescore
  38. 2026-06-05 22:46 UTCEPSS rescore
  39. 2026-06-05 22:46 UTCEPSS rescore
  40. 2026-06-05 06:10 UTCEPSS rescore
  41. 2026-06-05 06:10 UTCEPSS rescore
  42. 2026-06-04 13:11 UTCEPSS rescore
  43. 2026-06-04 13:11 UTCEPSS rescore
  44. 2026-06-02 20:12 UTCEPSS rescore
  45. 2026-06-02 20:12 UTCEPSS rescore
  46. 2026-06-01 13:51 UTCEPSS rescore
  47. 2026-06-01 13:51 UTCEPSS rescore
  48. 2026-05-31 22:30 UTCEPSS rescore
  49. 2026-05-31 22:30 UTCEPSS rescore
  50. 2026-05-31 00:16 UTCEPSS rescore
  51. 2026-05-31 00:16 UTCEPSS rescore
  52. 2026-05-30 00:22 UTCEG score recompute
  53. 2026-05-30 00:22 UTCGHSA enrichment
  54. 2026-05-29 13:44 UTCEPSS rescore

Publicly available exploits

(1 reference)

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

  • GitHub PoCjordan922/cve2025-20265
    First seen Aug 15, 2025

    Safe Python script to detect Cisco FMC instances potentially vulnerable to CVE-2025-20265. Uses official FMC API to check version, supports single/multi-target scanning, and includes a harmless local PoC marker.

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2025-20265?
CVE-2025-20265 is a critical vulnerability published on August 14, 2025. A vulnerability in the RADIUS subsystem implementation of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remote attacker to inject arbitrary shell commands that are executed by the device.  This vulnerability is due to a lack of proper handling of user…
When was CVE-2025-20265 disclosed?
CVE-2025-20265 was first published in the National Vulnerability Database on August 14, 2025, with the most recent update on August 16, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-20265 actively exploited?
CVE-2025-20265 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 96.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-20265?
CVE-2025-20265 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2025-20265?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-20265, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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