Anatel and federal courts suspend SEI access after critical PHP flaws; government issues alert
Brazil's telecom regulator Anatel and at least three federal courts suspended external access on Thursday (22) to the SEI (Sistema Eletrônico de Informações), the electronic system used across the federal government and judiciary to process administrative and judicial cases, as a precaution after two critical security flaws were identified in PHP, one of the internet's most widely used programming languages. On Wednesday (21), the federal government issued an alert through the Integrated Cybersecurity Center for Digital Government (CISC), ordering public agencies to update the software immediately. According to g1, the vulnerabilities could allow attackers to take control of the servers running affected websites without any login or password. A patch is already available. So far there are no reports of major impacts in Brazil, according to experts consulted by the portal, and none of the affected bodies has reported any sign of intrusion or data leak. How the flaws were found The flaws were first reported in August this year by the security company Calif and by OpenAI, which identified them independently on the same day. Cloud security firm Wiz later said it found additional ways to exploit the vulnerabilities, using the AI models Gemini 4 Argon, from Google, and GPT-5.6 Sol, from OpenAI. On Wednesday (21), the flaws were publicly disclosed, PHP's developers released an emergency fix, and the CISC issued its alert to Brazilian agencies. The precautionary suspensions followed on Thursday (22). "These findings are among the most serious vulnerabilities discovered in PHP and possibly in software history," Wiz said. According to the company, the flaws went unnoticed for more than a decade because finding and exploiting this kind of vulnerability was extremely complex without AI. "Public rankings still point to PHP as the language used in about 70% of websites. With this vulnerability discovered, sites that are not updated quickly could be invaded," Thiago Ayub, technology director at Sage Networks, told g1. What the institutions say Anatel said it temporarily suspended external access to the SEI and to other online services as a preventive measure while technical assessments are carried out. The Regional Federal Courts of the 4th Region (TRF4) and of the 1st Region (TRF1), which are federal appellate courts, confirmed the suspension of external access to the system. The TRF6 said it suspended access to its electronic judicial case system and to the SEI for the same reason. "The measure is preventive and aims to safeguard the security of the system and the integrity of institutional information. At the moment, there is no forecast for restoring external access to the SEI," the TRF1 said. The alert triggered similar reactions abroad. The US National Security Agency urged organizations to patch the flaws immediately or shut down vulnerable systems. In France, local administration websites, including that of the Paris Police Prefecture, went offline at the request of the national cybersecurity agency after what the Interior Ministry called the "detection of a critical security vulnerability." According to the BBC, Wikimedia, the Finnish government and the city of Edinburgh also took sites offline as a precaution. The next step depends on the ongoing technical assessments: Anatel tied the restoration of services to the completion of those reviews, and the TRF1 says there is no timeline for reopening external access. G1 contacted the Superior Electoral Court (TSE) to ask whether the flaws affect its systems and whether there could be any impact on the elections, days before the presidential runoff, and is awaiting a response.
HBHenrique Barros