CVE-2025-13943

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-02-24. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: None knownExposed: 0

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

A post-authentication command injection vulnerability in the log file download function of the Zyxel EX3301-T0 firmware versions through 5.50(ABVY.7)C0 could allow an authenticated attacker to execute operating system (OS) commands on an affected device.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: 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
Severity88% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
71%
KEV
Not listed

Published

February 24, 2026

Last Modified

June 17, 2026

Advisory Details (1)

Auto-updated Aug 2, 2026
No patch confirmed yet.
generic

Zyxel security advisory for null pointer dereference and command injection vulnerabilities in certain 4G LTE/5G NR CPE, DSL/Ethernet CPE, Fiber ONTs, Security Routers, and Wireless Extenders | Zyxel Networks

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-null-pointer-dereference-and-command-injection-vulnerabilities-in-certain-4g-lte-5g-nr-cpe-dsl-ethernet-cpe-fiber-onts-security-routers-and-wireless-extenders-02-24-2026

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 26× 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. 2026-09-22 14:47 UTCEPSS rescore
  2. 2026-09-20 20:14 UTCEPSS rescore
  3. 2026-09-18 19:27 UTCEPSS rescore
  4. 2026-09-16 14:06 UTCEPSS rescore
  5. 2026-09-16 05:13 UTCEPSS rescore
  6. 2026-09-15 03:08 UTCEPSS rescore
  7. 2026-09-13 16:45 UTCEPSS rescore
  8. 2026-09-12 14:59 UTCEPSS rescore
  9. 2026-09-11 14:51 UTCEPSS rescore
  10. 2026-09-11 09:35 UTCEPSS rescore
  11. 2026-09-10 09:33 UTCEPSS rescore
  12. 2026-09-08 21:59 UTCEPSS rescore
  13. 2026-09-07 16:00 UTCEPSS rescore
  14. 2026-09-06 13:46 UTCEPSS rescore
  15. 2026-09-04 13:59 UTCEPSS rescore
  16. 2026-09-04 05:05 UTCEPSS rescore
  17. 2026-09-02 14:10 UTCEPSS rescore
  18. 2026-09-01 13:52 UTCEPSS rescore
  19. 2026-09-01 04:38 UTCEPSS rescore
  20. 2026-08-30 19:16 UTCEPSS rescore
  21. 2026-08-30 01:21 UTCEPSS rescore
  22. 2026-08-28 21:40 UTCEPSS rescore
  23. 2026-08-27 14:24 UTCEPSS rescore
  24. 2026-08-26 14:45 UTCEPSS rescore
  25. 2026-08-25 13:47 UTCEPSS rescore
Show 53 more
  1. 2026-08-24 14:15 UTCEPSS rescore
  2. 2026-08-23 00:18 UTCEPSS rescore
  3. 2026-08-21 23:48 UTCEPSS rescore
  4. 2026-08-20 22:54 UTCEPSS rescore
  5. 2026-08-19 17:02 UTCEPSS rescore
  6. 2026-08-18 13:47 UTCEPSS rescore
  7. 2026-08-17 13:46 UTCEPSS rescore
  8. 2026-08-16 14:55 UTCEPSS rescore
  9. 2026-08-16 02:13 UTCEPSS rescore
  10. 2026-08-16 02:13 UTCEPSS rescore
  11. 2026-08-15 01:29 UTCEPSS rescore
  12. 2026-08-14 21:29 UTCGHSA enrichment
  13. 2026-08-14 09:09 UTCEG score recompute
  14. 2026-08-14 09:09 UTCGHSA enrichment
  15. 2026-08-13 21:59 UTCEPSS rescore
  16. 2026-08-13 01:10 UTCEG score recompute
  17. 2026-08-13 01:10 UTCGHSA enrichment
  18. 2026-08-12 13:49 UTCEPSS rescore
  19. 2026-08-12 00:58 UTCEG score recompute
  20. 2026-08-12 00:58 UTCGHSA enrichment
  21. 2026-08-11 13:41 UTCEPSS rescore
  22. 2026-08-11 06:40 UTCEG score recompute
  23. 2026-08-11 06:39 UTCGHSA enrichment
  24. 2026-08-10 23:59 UTCEPSS rescore
  25. 2026-08-10 09:06 UTCGHSA enrichment
  26. 2026-08-09 19:59 UTCEG score recompute
  27. 2026-08-09 19:59 UTCGHSA enrichment
  28. 2026-08-09 13:45 UTCEPSS rescore
  29. 2026-08-09 08:47 UTCEG score recompute
  30. 2026-08-09 08:47 UTCGHSA enrichment
  31. 2026-08-08 08:06 UTCGHSA enrichment
  32. 2026-08-07 20:54 UTCEG score recompute
  33. 2026-08-07 20:54 UTCGHSA enrichment
  34. 2026-08-07 16:26 UTCEPSS rescore
  35. 2026-08-06 13:45 UTCEPSS rescore
  36. 2026-08-06 03:09 UTCEG score recompute
  37. 2026-08-06 03:09 UTCGHSA enrichment
  38. 2026-08-05 19:16 UTCEPSS rescore
  39. 2026-08-04 15:09 UTCEPSS rescore
  40. 2026-08-04 10:37 UTCEPSS rescore
  41. 2026-08-04 06:00 UTCEG score recompute
  42. 2026-08-04 06:00 UTCGHSA enrichment
  43. 2026-08-03 10:35 UTCEPSS rescore
  44. 2026-08-02 19:44 UTCEG score recompute
  45. 2026-08-02 19:44 UTCGHSA enrichment
  46. 2026-08-02 02:25 UTCEPSS rescore
  47. 2026-08-01 04:14 UTCEPSS rescore
  48. 2026-07-30 16:26 UTCEPSS rescore
  49. 2026-07-30 01:29 UTCEPSS rescore
  50. 2026-07-28 15:35 UTCEPSS rescore
  51. 2026-07-27 14:12 UTCEPSS rescore
  52. 2026-07-27 13:34 UTCEG score recompute
  53. 2026-07-27 13:34 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2025-13943?
CVE-2025-13943 is a high vulnerability published on February 24, 2026. A post-authentication command injection vulnerability in the log file download function of the Zyxel EX3301-T0 firmware versions through 5.50(ABVY.7)C0 could allow an authenticated attacker to execute operating system (OS) commands on an affected device.
When was CVE-2025-13943 disclosed?
CVE-2025-13943 was first published in the National Vulnerability Database on February 24, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-13943 actively exploited?
CVE-2025-13943 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 28.8% of all scored CVEs.
What is the CVSS score of CVE-2025-13943?
CVE-2025-13943 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2025-13943?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-13943, 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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