CVE WatchSep 25, 2026

CVE-2026-67276

RouterOS does not compare the complete RSA public key when matching an SSH authentication request to an authorized user key, checking the ke

CVSS

8.1

High

EPSS

8.9%

p95

KEV

—

Exploit Today

0-100

Published: Sep 5, 2026 · Last modified: Sep 25, 2026 · CWE-347

EPSS · 30d

6.5%EPSS · 30 days8.9%

2026-10-012026-10-28

Technical 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)

Official references

Related CVEs

CVECVSSEPSSKEVRExploitTitleMod.

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