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.
CVE-2025-13943
HIGHNVD 8.88.8—Trending — 3 sources updated this week
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: 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.
- CVSS v3
- 8.8
- EG Score
- 8.8(medium)
- EG Risk
- 44(Track)EG Risk 44/100SSVC: 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 computedSeverity88% × 45%Exploitation0% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 1%
- EPSS %ILE
- 70%
- KEV
- Not listed
Published
February 24, 2026
Last Modified
June 17, 2026
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 4× in last 7d / 4× 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.
- 2026-07-28 15:35 UTCEPSS rescore
- 2026-07-27 14:12 UTCEPSS rescore
- 2026-07-27 13:34 UTCEG score recompute
- 2026-07-27 13:34 UTCGHSA enrichment
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 30.4% 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
Explore the affected products and dependency analysis for CVE-2025-13943
Is Your Infrastructure Affected by CVE-2025-13943?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.