VULNERABILITY INTELLIGENCE

CVE-2026-67276

CVSS score8.1 HIGH
EPSS probability8.94%
CISA KEVNot currently listed
Published2026-09-05
Last modified2026-09-25
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

RouterOS does not compare the complete RSA public key when matching an SSH authentication request to an authorized user key, checking the key type and modulus but omitting the exponent. Because signature verification uses the client-supplied key, an attacker knowing an authorized RSA modulus can supply a key with exponent one, forge a valid signature, and open an SSH command channel as the target user without the private key.This issue affects only 7.x branch was fixed in versions: 7.23.4 (Long-term) and 7.24.2 (Stable)

Weakness classification

  • cvd@cert.pl: CWE-347

Primary references