Back to Rule

Rule History

SID: 10016325 • Source: ptrules/open

Version Details

Rev: 4Feb 11, 2026, 8:15 AM

ATTACK [PTsecurity] Telnetd Authentication Bypass attempt (CVE-2026-24061)

alert tcp any any -> any 21 (msg:"ATTACK [PTsecurity] Telnetd Authentication Bypass attempt (CVE-2026-24061)"; flow:established, to_server; content:"|ff fa 27|"; content:"|00|USER|01|"; distance:0; content:"-f"; distance:0; pcre:"/USER\x01[^\x00\xff]*?-f/"; flowbits:set, Telnetd.exploit.flg; reference:cve, 2026-24061; reference:url, www.opennet.ru/opennews/art.shtml?num=64649; reference:url, rules.ptsecurity.com; classtype:attempted-admin; sid:10016325; rev:4;)

Feb 11, 2026, 8:15 AM

Feb 11, 2026, 8:15 AM

Mar 2, 2026, 1:34 PM

Mar 2, 2026, 1:34 PM

May 15, 2026, 1:35 PM

rules/ptopen-attacks.rules