Mikrotik RouterOS up to 6.49.20/7.23.3/7.24.1 WebFig information disclosure

Summaryinfo

A vulnerability classified as problematic was found in Mikrotik RouterOS up to 6.49.20/7.23.3/7.24.1. This impacts an unknown function of the component WebFig. Executing a manipulation can lead to information disclosure. The identification of this vulnerability is CVE-2026-67281. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Mikrotik RouterOS up to 6.49.20/7.23.3/7.24.1. It has been declared as problematic. This vulnerability affects an unknown function of the component WebFig. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

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 (Lont-term), 7.23.4 (Lont-term) and 7.24.2 (Stable)

The advisory is shared for download at cert.pl. This vulnerability was named CVE-2026-67281 since 07/29/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1592.

Upgrading to version 6.49.21, 7.23.4 or 7.24.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-72028). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• Mikrotik

Name

• RouterOS

Version

• 6.49.0
• 6.49.1
• 6.49.2
• 6.49.3
• 6.49.4
• 6.49.5
• 6.49.6
• 6.49.7
• 6.49.8
• 6.49.9
• 6.49.10
• 6.49.11
• 6.49.12
• 6.49.13
• 6.49.14
• 6.49.15
• 6.49.16
• 6.49.17
• 6.49.18
• 6.49.19
• 6.49.20
• 7.23.0
• 7.23.1
• 7.23.2
• 7.23.3
• 7.24.0
• 7.24.1

License

• commercial

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Once again VulDB remains the best source for vulnerability data.

Discussion