Threat Intelligence / CVE / CVE-2026-67281

CVE-2026-67281 — Mikrotik RouterOS

CVSS v4.0 8.7 (High, derived from score) · EPSS 0.4% (higher than 38.4% of all scored CVEs) · Priority 7.9/10 · Published 2026-09-05

As of 2026-09-05, CVE-2026-67281 is a High-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in Mikrotik RouterOS, CVSS v4.0 8.7, EPSS 0.4% (38.4th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-67281, most recently “Attackers Hijack MikroTik Routers Through Internet-Exposed SSH Without Authentication (MikroTrick)”.

Last updated: 2026-09-05

What is CVE-2026-67281?

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 was fixed in versions: 6.49.21 (Long-term), 7.23.4 (Long-term) and 7.24.2 (Stable)

The record classifies CVE-2026-67281 under weakness classes CWE-824, CWE-22. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 13 days ago.

Severity and exploitation probability

CVSS v4.0 base score
8.7 — High (derived from score)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS (FIRST)
0.4% probability of exploitation in the next 30 days, higher than 38.4% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
7.9/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-09-05

Is CVE-2026-67281 being exploited?

Weaponised exploit code for CVE-2026-67281 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. It currently carries a trending score of 47 in the Threadlinqs vulnerability feed.

Affected products and versions

How to fix CVE-2026-67281

No vendor patch reference has been recorded for CVE-2026-67281 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-67281

1 tracked threat in the Threadlinqs corpus references CVE-2026-67281, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.

Vendor advisory and patch

Exploit and proof of concept

Technical analysis

Third-party advisory

Full detection coverage & IOCs for threats exploiting CVE-2026-67281 are available via the Threadlinqs MCP server (Purple tier). View plans →

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