CVE-2026-67281
published 2026-09-05CVE-2026-67281: RouterOS WebFig contains an unauthenticated file-read vulnerability in the /jsproxy path where a newly allocated session retains a stale uninitialized…
PriorityP354high7.5CVSS 3.1
AVNACLPRNUINSUCHINAN
EPSS
0.73%
52.5th percentile
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)
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mikrotik | routeros | >= 7.20 < 7.23.4 | 7.23.4 |
| mikrotik | routeros | >= 7.24 < 7.24.2 | 7.24.2 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
nvdv4.08.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
VulDB
Mikrotik RouterOS up to 6.49.20/7.23.3/7.24.1 WebFig information disclosure (EUVD-2026-72028)
vuldb·2026-09-05·CVSS 8.7
CVE-2026-67281 [HIGH] Mikrotik RouterOS up to 6.49.20/7.23.3/7.24.1 WebFig information disclosure (EUVD-2026-72028)
A vulnerability classified as problematic has been found in Mikrotik RouterOS up to 6.49.20/7.23.3/7.24.1. This affects an unknown function of the component WebFig. Performing a manipulation results in information disclosure.
This vulnerability was named CVE-2026-67281. The attack may be initiated remotely. There is no available exploit.
It is recommended to upgrade the affected component.
GHSA
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.
ghsa_unreviewed·2026-09-05
CVE-2026-67281 [HIGH] CWE-22 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.
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)
No detection rules found.
No public exploits indexed.
https://cert.pl/en/posts/2026/09/mikrotik-routeros-cvehttps://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/https://forum.mikrotik.com/t/7-23-4-long-term-is-released/272801https://forum.mikrotik.com/t/7-24-2-stable-is-released/272800https://mikrotik.com/supportsec/september-2026-vulnerability/https://npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/
2026-09-05
Published