You try taking a notoriously brutal entrance exam at home while artificial intelligence watches your every move. It sounds convenient. It turned into a total disaster.
The National Autonomous University of Mexico (UNAM) recently faced an impossible reality check after running its first-ever fully remote admissions process. Nearly 160,000 students logged on from their living rooms, bedrooms, and kitchen tables. When the scores came back, administrators noticed something mathematically impossible. The number of high achievers didn't just grow—it exploded. Now, roughly 58,000 applicants have to throw out those scores and show up in person for a mandatory control exam.
If you think remote proctoring is bulletproof, this scandal proves you are dead wrong.
The Numbers That Exposed the System
How do you spot a cheating epidemic when millions of lines of code are supposedly guarding the test? You look at historical baselines.
Between 2021 and 2025, getting a score of 100 out of 120 on UNAM's entrance exam was elite territory. Only 3.5% of applicants managed it. But during the remote test, that figure jumped to 16%. For top-tier tracks like medicine, nearly 30% of applicants cleared the 100-mark compared to just 9% the previous year. Scores of 110 and above surged sixfold.
Human populations don't suddenly get four times smarter in twelve months. The test security had completely collapsed.
UNAM tried to protect the process using a mix of lockdown browsers and webcam monitoring powered by artificial intelligence. It sounds high-tech on paper. In practice, the safeguards suffered from glaring blind spots. A lockdown browser locks down the machine running the exam, but it ignores the second laptop sitting two feet to the left. Webcams scan for earphones, so students hid earbuds underneath long hair. Others placed external monitors just out of frame to query tools like ChatGPT, Claude, or Gemini in real-time.
The system caught about 2% of test-takers for blatant rules violations, canceling over 3,000 exams. Independent statistical experts estimate the actual scale of cheating was closer to half of all test-takers.
Why UNAM Tried Going Remote in the First Place
You have to understand the scale of the logistical monster UNAM deals with every single year. More than 150,000 young people fight tooth and nail for roughly 22,000 available slots.
Historically, applicants had to travel physically to Mexico City from remote towns and distant states. Many families spent hard-earned money on buses, hotels, and travel logistics just to secure a seat in a lecture hall. Moving the exam online was supposed to democratize access. It was meant to save rural students time and cash.
Instead, it opened the floodgates to widespread fraud. Questions leaked online while the testing window was still open. Commercial entities and shady online brokers popped up offering guaranteed passing scores for a price. UNAM filed criminal complaints against these operators, but the damage was already done.
President Claudia Sheinbaum weighed in, noting that the attorney general's office might need to step in to investigate criminal misconduct. Meanwhile, hundreds of stressed applicants took to the streets of Mexico City, staging protests against the sudden chaos.
The Hard Lesson for Global Education
Universities everywhere love the idea of scaling down administrative costs through remote testing. They want frictionless, digital admissions. This mess in Mexico sends a stark warning to every single dean and provost on the planet.
Technology cannot substitute for physical supervision when the stakes are high enough. When a university degree acts as a ticket out of poverty, people will engineer every possible workaround to beat the software. AI proctoring tools check boxes for compliance officers, but they fail to stop coordinated human ingenuity.
UNAM's rector, Leonardo Lomelí, offered a public apology to the honest students who prepared rigorously and now have to sit for another exam. It is an unfair burden on honest applicants. Yet, the institution chose accountability over sweeping the problem under the rug. Classes that were supposed to start on August 10 are pushed back to August 31.
If your institution is considering ditching physical test centers for convenience, look at what happened in Mexico. Convenience is useless if you cannot trust the score.
Get ready to clear your schedule if you want a seat at a major university. The era of unsupervised remote testing for high-stakes admissions is hitting a very hard wall.
UNAM cheating scandal explained in under 5 minutes
This video provides a concise breakdown of how the online entrance exam setup unraveled and why the university had to mandate in-person resits.
http://googleusercontent.com/youtube_content/1
