Yahoo, the once all-conquering internet giant which has in recent years stumbled from crisis to crisis, faces legal action unless it fires its chief executive by a shareholder-imposed deadline today.
The extraordinary ultimatum came after it was alleged that Scott Thompson, whom Yahoo poached from eBay just four months ago, had lied on his CV by inventing a computer science degree that his university never offered.
After initially dismissing the issue as an "inadvertent error", Yahoo is now engaged in a frantic review of why Thompson was claimed to have two degrees - one in accounting, the other in computer science - from Stonehill College, the Catholic university near Boston where he graduated in 1979.
Its computer science course did not start until 1983.
The two degrees have appeared on the executive's resume periodically as he has built a career in the technology sector that took him to the helm of eBay's subsidiary PayPal and then to Yahoo in January.
While Yahoo is still one of the most visited properties on the web, it has been surpassed in search and advertising by Google and missed the social networking bandwagon begun with Facebook.
Its share price has languished and shareholders have become angry with a board of directors they claim is too timid.
Thompson was brought in to shake things up and already appeared to be making his mark.
The CV discrepancy was discovered by Daniel Loeb, a hedge fund manager who has been harrying Yahoo's board to demand major changes, including a board seat for himself.
He declared on Friday that he would launch legal action against the company if Thompson was still in his post by noon (US time).