CVE-2025-25256

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2025-08-12. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
9.8EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 65%
  • Public exploit code is available (ssvc poc, epss top5pct, epss high, public exploit)
CISA-KEV: Not listedEPSS PROB: 65%CVSS: 9.8Exploit: ssvc poc · epss top5pct · epss high · public exploitExposed: 0

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

An improper neutralization of special elements used in an OS command ('OS Command Injection') vulnerability [CWE-78] vulnerability in Fortinet FortiSIEM 7.3.0 through 7.3.1, FortiSIEM 7.2.0 through 7.2.5, FortiSIEM 7.1.0 through 7.1.7, FortiSIEM 7.0.0 through 7.0.3, FortiSIEM 6.7.0 through 6.7.9, FortiSIEM 6.6 all versions, FortiSIEM 6.5 all versions, FortiSIEM 6.4 all versions, FortiSIEM 6.3 all versions, FortiSIEM 6.2 all versions, FortiSIEM 6.1 all versions, FortiSIEM 5.4 all versions, FortiSIEM 5.3 all versions, FortiSIEM 5.2 all versions, FortiSIEM 5.1 all versions, FortiSIEM 5.0 all versions, FortiSIEM 4.10 all versions, FortiSIEM 4.9 all versions, FortiSIEM 4.7 all versions allows an unauthenticated attacker to execute unauthorized code or commands via crafted CLI requests.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
85(Attend)
EG Risk 85/100SSVC: Attend

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
Severity98% × 45%
Exploitation65% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
65%
EPSS %ILE
99%
KEV
Not listed

Published

August 12, 2025

Last Modified

August 18, 2026

Advisory Details (4)

Auto-updated Sep 16, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic🔴 Active Exploitation

Should Security Solutions Be Secure? Maybe We're All Wrong - Fortinet FortiSIEM Pre-Auth Command Injection (CVE-2025-25256)

https://labs.watchtowr.com/should-security-solutions-be-secure-maybe-were-all-wrong-fortinet-fortisiem-pre-auth-command-injection-cve-2025-25256/
generic

GitHub - watchtowrlabs/watchTowr-vs-FortiSIEM-CVE-2025-25256 · GitHub

https://github.com/watchtowrlabs/watchTowr-vs-FortiSIEM-CVE-2025-25256
generic🔴 Active Exploitation

Fortinet discloses critical bug with working exploit code

https://www.theregister.com/2025/08/13/fortinet_discloses_critical_bug/
generic

Just a moment

https://fortiguard.fortinet.com/psirt/FG-IR-25-152

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 3× in last 7d / 20× 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 115 total refreshes for this CVE.

  1. 2026-09-18 19:27 UTCEPSS rescore
  2. 2026-09-16 14:06 UTCEPSS rescore
  3. 2026-09-16 05:13 UTCEPSS rescore
  4. 2026-09-15 03:09 UTCEPSS rescore
  5. 2026-09-13 16:46 UTCEPSS rescore
  6. 2026-09-12 15:00 UTCEPSS rescore
  7. 2026-09-11 14:51 UTCEPSS rescore
  8. 2026-09-10 09:33 UTCEPSS rescore
  9. 2026-09-08 21:59 UTCEPSS rescore
  10. 2026-09-06 13:46 UTCEPSS rescore
  11. 2026-09-06 13:46 UTCEPSS rescore
  12. 2026-09-05 15:28 UTCEPSS rescore
  13. 2026-09-04 05:05 UTCEPSS rescore
  14. 2026-09-02 14:11 UTCEPSS rescore
  15. 2026-09-01 13:52 UTCEPSS rescore
  16. 2026-09-01 04:38 UTCEPSS rescore
  17. 2026-08-30 19:16 UTCEPSS rescore
  18. 2026-08-30 01:21 UTCEPSS rescore
  19. 2026-08-28 21:40 UTCEPSS rescore
  20. 2026-08-27 14:24 UTCEPSS rescore
  21. 2026-08-23 00:18 UTCEPSS rescore
  22. 2026-08-21 23:48 UTCEPSS rescore
  23. 2026-08-20 22:54 UTCEPSS rescore
  24. 2026-08-19 17:03 UTCEPSS rescore
  25. 2026-08-18 21:36 UTCEG score recompute
Show 75 more
  1. 2026-08-18 21:36 UTCGHSA enrichment
  2. 2026-08-18 13:47 UTCEPSS rescore
  3. 2026-08-17 13:46 UTCEPSS rescore
  4. 2026-08-16 14:55 UTCEPSS rescore
  5. 2026-08-16 02:13 UTCEPSS rescore
  6. 2026-08-16 02:13 UTCEPSS rescore
  7. 2026-08-15 01:29 UTCEPSS rescore
  8. 2026-08-13 21:59 UTCEPSS rescore
  9. 2026-08-12 13:50 UTCEPSS rescore
  10. 2026-08-07 16:26 UTCEPSS rescore
  11. 2026-08-06 13:46 UTCEPSS rescore
  12. 2026-08-05 19:16 UTCEPSS rescore
  13. 2026-08-01 04:15 UTCEPSS rescore
  14. 2026-07-30 16:27 UTCEPSS rescore
  15. 2026-07-30 01:29 UTCEPSS rescore
  16. 2026-07-27 14:12 UTCEPSS rescore
  17. 2026-07-26 14:53 UTCEPSS rescore
  18. 2026-07-25 14:17 UTCEPSS rescore
  19. 2026-07-24 14:17 UTCEPSS rescore
  20. 2026-07-23 02:51 UTCEG score recompute
  21. 2026-07-22 14:07 UTCEPSS rescore
  22. 2026-07-22 14:07 UTCEPSS rescore
  23. 2026-07-20 17:07 UTCEPSS rescore
  24. 2026-07-19 14:30 UTCEPSS rescore
  25. 2026-07-19 14:30 UTCEPSS rescore
  26. 2026-07-19 02:28 UTCEPSS rescore
  27. 2026-07-19 02:28 UTCEPSS rescore
  28. 2026-07-16 17:02 UTCEPSS rescore
  29. 2026-07-15 16:57 UTCEPSS rescore
  30. 2026-07-15 16:57 UTCEPSS rescore
  31. 2026-07-15 01:59 UTCEPSS rescore
  32. 2026-07-13 22:29 UTCEPSS rescore
  33. 2026-07-13 22:29 UTCEPSS rescore
  34. 2026-07-13 06:12 UTCEPSS rescore
  35. 2026-07-13 06:12 UTCEPSS rescore
  36. 2026-07-12 05:46 UTCEPSS rescore
  37. 2026-07-12 05:46 UTCEPSS rescore
  38. 2026-07-11 08:27 UTCEPSS rescore
  39. 2026-07-11 08:26 UTCEPSS rescore
  40. 2026-07-09 19:09 UTCEPSS rescore
  41. 2026-07-05 02:30 UTCEPSS rescore
  42. 2026-07-04 06:30 UTCEPSS rescore
  43. 2026-07-01 15:06 UTCEPSS rescore
  44. 2026-06-30 23:21 UTCEPSS rescore
  45. 2026-06-30 23:21 UTCEPSS rescore
  46. 2026-06-29 14:06 UTCEPSS rescore
  47. 2026-06-28 14:07 UTCEPSS rescore
  48. 2026-06-28 14:07 UTCEPSS rescore
  49. 2026-06-28 04:55 UTCEPSS rescore
  50. 2026-06-28 04:55 UTCEPSS rescore
  51. 2026-06-27 03:08 UTCEPSS rescore
  52. 2026-06-27 03:08 UTCEPSS rescore
  53. 2026-06-25 13:49 UTCEPSS rescore
  54. 2026-06-25 13:49 UTCEPSS rescore
  55. 2026-06-23 21:32 UTCEPSS rescore
  56. 2026-06-23 21:32 UTCEPSS rescore
  57. 2026-06-21 14:56 UTCEPSS rescore
  58. 2026-06-21 14:56 UTCEPSS rescore
  59. 2026-06-21 01:59 UTCEPSS rescore
  60. 2026-06-21 01:59 UTCEPSS rescore
  61. 2026-06-17 17:52 UTCEPSS rescore
  62. 2026-06-16 17:52 UTCEPSS rescore
  63. 2026-06-16 17:52 UTCEPSS rescore
  64. 2026-06-15 17:48 UTCEPSS rescore
  65. 2026-06-13 22:59 UTCEPSS rescore
  66. 2026-06-12 23:11 UTCEPSS rescore
  67. 2026-06-11 13:59 UTCEPSS rescore
  68. 2026-06-10 22:18 UTCEPSS rescore
  69. 2026-06-10 13:22 UTCEPSS rescore
  70. 2026-06-08 14:16 UTCEPSS rescore
  71. 2026-06-08 14:16 UTCEPSS rescore
  72. 2026-06-06 13:47 UTCEPSS rescore
  73. 2026-06-06 13:47 UTCEPSS rescore
  74. 2026-06-05 22:46 UTCEPSS rescore
  75. 2026-06-05 22:46 UTCEPSS rescore

Publicly available exploits

(2 references)

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 PoCwatchtowrlabs/watchTowr-vs-FortiSIEM-CVE-2025-25256
    First seen Aug 15, 2025
    Open source ↗
  • Nucleinetwork/cves/2025/CVE-2025-25256.yaml
    First seen Jan 1, 2025

    Fortinet FortiSIEM - OS Command Injection

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2025-25256?
CVE-2025-25256 is a critical vulnerability published on August 12, 2025. An improper neutralization of special elements used in an OS command ('OS Command Injection') vulnerability [CWE-78] vulnerability in Fortinet FortiSIEM 7.3.0 through 7.3.1, FortiSIEM 7.2.0 through 7.2.5, FortiSIEM 7.1.0 through 7.1.7, FortiSIEM 7.0.0 through 7.0.3, FortiSIEM 6.7.0 through 6.7.9,…
When was CVE-2025-25256 disclosed?
CVE-2025-25256 was first published in the National Vulnerability Database on August 12, 2025, with the most recent update on August 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-25256 actively exploited?
CVE-2025-25256 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 65% probability of exploitation in the next 30 days, which ranks it in the top 0.8% of all scored CVEs.
What is the CVSS score of CVE-2025-25256?
CVE-2025-25256 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2025-25256?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-25256, 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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