CVE-2025-20248

MEDIUMNVD 6.06.0—
EchelonGraph scoreMEDIUM confidence

Score 6.0 from GitHub Security Advisory published 2025-09-10. NVD baseline CVSS 6.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.0Exploit: NoneExposed: 0

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

A vulnerability in the installation process of Cisco IOS XR Software could allow an authenticated, local attacker to bypass Cisco IOS XR Software image signature verification and load unsigned software on an affected device. To exploit this vulnerability, the attacker must have root-system privileges on the affected device. This vulnerability is due to incomplete validation of files during the installation of an .iso file. An attacker could exploit this vulnerability by modifying contents of the .iso image and then installing and activating it on the device. A successful exploit could allow the attacker to load an unsigned file as part of the image activation process.

CVSS v3
6.0
EG Score
6.0(medium)
EG Risk
27(Track)
EG Risk 27/100SSVC: 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
Severity60% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
0.9%
KEV
Not listed

Published

September 10, 2025

Last Modified

April 15, 2026

References (1)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 33× 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 101 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2025-20248?
CVE-2025-20248 is a medium vulnerability published on September 10, 2025. A vulnerability in the installation process of Cisco IOS XR Software could allow an authenticated, local attacker to bypass Cisco IOS XR Software image signature verification and load unsigned software on an affected device. To exploit this vulnerability, the attacker must have root-system…
When was CVE-2025-20248 disclosed?
CVE-2025-20248 was first published in the National Vulnerability Database on September 10, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-20248 actively exploited?
CVE-2025-20248 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-20248?
CVE-2025-20248 has a CVSS v3 base score of 6.0 (NVD).
How do I remediate CVE-2025-20248?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-20248, 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.

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