Cisco and ISS are going through some of their worst days. The two companies are trying now to stop the presentation from spreading on the Internet, after succeeding Thursday to silence Mike Lynn, an ex researcher at ISS, who showed a material, whose subject was a flaw in the company's routers at the Black Hat Conference.

A few hours before the court order that summoned Lynn to stop disclosing details of its researches was issued, two versions of its presentation, as well as photographs taken at the Black Hat Conference, have started to roam the Internet.

Although Cisco updated the firmware in April, after it had been informed by ISS, those who have ignored it, are still exposed to the exploit that takes advantage of the vulnerability described by Lynn.

Richard Forno, another security expert that posted the Lynn's presentation on his website, Infowarrior.org, has received a cease and desist letter from ISS. As a result of this, he decided to delete the material.

It is not known how many such letters has ISS sent, but Cisco denies having anything to do with these actions.

The administrator of another site which offered Lynn's presentation, Cryptome, refused to comment whether he was threatened by ISS, but he did says that his site's policy is not to take these e-mails into consideration.

The interest taken in Cisco routers and in the vulnerability tracked in the IOS (Internet Operating System) draws the attention of an increasing number of persons, and most of them do not agree with Cisco's and ISS's way of solving the problem.

The whole story tends to transform itself into a public debate related to the idea whether disclosing such information is useful to hackers or to users.