CVE-2026-67281

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 62% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this weekElevated
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.7Exploit: Elevated riskExposed: 0

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

RouterOS WebFig contains an unauthenticated file-read vulnerability in the /jsproxy path where a newly allocated session retains a stale uninitialized principal pointer used for file authorization. An unauthenticated attacker can prepare the allocator so that the file-serving path dereferences this pointer with sufficient rights, then supply parent-directory components in an encrypted URI to escape the WebFig file namespace and disclose root-owned files, including configuration stores containing credentials.This issue affects only 7.x branch was fixed in versions: 7.23.4 (Long-term) and 7.24.2 (Stable)

CVSS v3
8.7
EG Score
8.7(medium)
EG Risk
70(Attend)
EG Risk 70/100SSVC: 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
Severity87% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
38%
KEV
Not listed

Published

September 5, 2026

Last Modified

September 8, 2026

Advisory Details (7)

Auto-updated Sep 5, 2026
⚠️ Active exploitation confirmed. Patch available.
generic

7.24.2 [stable] is released! - Announcements - MikroTik community forum

https://forum.mikrotik.com/t/7-24-2-stable-is-released/272800
generic

7.23.4 [long-term] is released! - Announcements - MikroTik community forum

https://forum.mikrotik.com/t/7-23-4-long-term-is-released/272801
generic

6.49.21 [long-term] is released! - Announcements - MikroTik community forum

https://forum.mikrotik.com/t/6-49-21-long-term-is-released/272802
generic

MikroTik · September 2026 vulnerability

https://mikrotik.com/supportsec/september-2026-vulnerability/
generic

Reversing MikroTik's Silent Patch: The RouterOS 7.23.4 Fix They Wouldn't Explain | Nick Pratley

https://npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/
generic🔴 Active Exploitation

Critical vulnerabilities in MikroTik RouterOS are being actively exploited. Immediate update recommended | CERT Polska

https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/
generic Patch Available

Vulnerabilities in Mikrotik RouterOS software | CERT Polska

https://cert.pl/en/posts/2026/09/mikrotik-routeros-cve

Vendor Advisories for CVE-2026-67281(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 24× in last 7d / 59× 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. 2026-09-19 09:55 UTCGHSA enrichment
  2. 2026-09-18 21:22 UTCEG score recompute
  3. 2026-09-18 21:22 UTCGHSA enrichment
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 08:26 UTCGHSA enrichment
  6. 2026-09-17 20:22 UTCEG score recompute
  7. 2026-09-17 20:22 UTCGHSA enrichment
  8. 2026-09-17 06:45 UTCGHSA enrichment
  9. 2026-09-16 18:36 UTCEG score recompute
  10. 2026-09-16 18:36 UTCGHSA enrichment
  11. 2026-09-16 14:08 UTCEPSS rescore
  12. 2026-09-16 06:32 UTCEG score recompute
  13. 2026-09-16 06:32 UTCGHSA enrichment
  14. 2026-09-16 05:15 UTCEPSS rescore
  15. 2026-09-15 18:29 UTCGHSA enrichment
  16. 2026-09-15 06:25 UTCEG score recompute
  17. 2026-09-15 06:25 UTCGHSA enrichment
  18. 2026-09-14 18:21 UTCGHSA enrichment
  19. 2026-09-14 05:45 UTCGHSA enrichment
  20. 2026-09-13 17:42 UTCEG score recompute
  21. 2026-09-13 17:42 UTCGHSA enrichment
  22. 2026-09-13 05:37 UTCGHSA enrichment
  23. 2026-09-12 17:34 UTCEG score recompute
  24. 2026-09-12 17:34 UTCGHSA enrichment
  25. 2026-09-12 05:29 UTCGHSA enrichment
Show 34 more
  1. 2026-09-11 17:25 UTCEG score recompute
  2. 2026-09-11 17:25 UTCGHSA enrichment
  3. 2026-09-11 14:53 UTCEPSS rescore
  4. 2026-09-11 09:37 UTCEPSS rescore
  5. 2026-09-11 05:20 UTCGHSA enrichment
  6. 2026-09-10 17:16 UTCEG score recompute
  7. 2026-09-10 17:16 UTCGHSA enrichment
  8. 2026-09-10 05:09 UTCGHSA enrichment
  9. 2026-09-09 17:05 UTCGHSA enrichment
  10. 2026-09-09 05:01 UTCEG score recompute
  11. 2026-09-09 05:01 UTCGHSA enrichment
  12. 2026-09-08 22:01 UTCEPSS rescore
  13. 2026-09-08 16:58 UTCEG score recompute
  14. 2026-09-08 16:58 UTCGHSA enrichment
  15. 2026-09-08 16:05 UTCEG score recompute
  16. 2026-09-08 16:05 UTCGHSA enrichment
  17. 2026-09-08 14:14 UTCGHSA enrichment
  18. 2026-09-08 02:30 UTCEG score recompute
  19. 2026-09-08 02:30 UTCGHSA enrichment
  20. 2026-09-07 16:01 UTCEPSS rescore
  21. 2026-09-07 14:27 UTCEG score recompute
  22. 2026-09-07 14:26 UTCGHSA enrichment
  23. 2026-09-07 13:36 UTCEG score recompute
  24. 2026-09-07 13:35 UTCGHSA enrichment
  25. 2026-09-07 09:30 UTCGHSA enrichment
  26. 2026-09-06 21:26 UTCEG score recompute
  27. 2026-09-06 21:26 UTCGHSA enrichment
  28. 2026-09-06 13:47 UTCEPSS rescore
  29. 2026-09-06 09:21 UTCGHSA enrichment
  30. 2026-09-05 21:17 UTCEG score recompute
  31. 2026-09-05 20:50 UTCEG score recompute
  32. 2026-09-05 20:24 UTCEG score recompute
  33. 2026-09-05 20:05 UTCEG score recompute
  34. 2026-09-05 20:05 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-67281?
CVE-2026-67281 is a high vulnerability published on September 5, 2026. RouterOS WebFig contains an unauthenticated file-read vulnerability in the /jsproxy path where a newly allocated session retains a stale uninitialized principal pointer used for file authorization. An unauthenticated attacker can prepare the allocator so that the file-serving path dereferences this…
When was CVE-2026-67281 disclosed?
CVE-2026-67281 was first published in the National Vulnerability Database on September 5, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67281 actively exploited?
CVE-2026-67281 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 61.5% of all scored CVEs.
What is the CVSS score of CVE-2026-67281?
CVE-2026-67281 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-67281?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67281, 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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