Smartphone users may face a spyware threat without clicking suspicious links or downloading malicious files. Pakistan’s National Cyber Emergency Response Team (National CERT) has warned about attacks that exploit online advertisements to compromise mobile devices.
According to its latest advisory, attackers are abusing digital advertising networks to profile users and deliver sophisticated spyware. The technique can potentially infect devices simply by loading an advertisement on a website or mobile application.
The warning highlights a growing cybersecurity concern because users may not need to interact with an advertisement for an attack to begin.
What Is AdFection and How Does It Work?
National CERT has highlighted a technique known as “AdFection,” which exploits digital advertising systems to distribute mercenary spyware. Attackers can misuse advertising networks to identify selected users and deliver malicious content through advertisements.
The technique allows attackers to target devices without requiring users to click suspicious links or open attachments. Instead, malicious code may reach a device through advertisements displayed on websites and mobile applications.
The advisory draws on research published by Citizen Lab on October 15, 2026. The research identified Pakistan among the countries heavily targeted in the advertisement-based spyware campaign.
Furthermore, Citizen Lab documented a high-confidence finding involving devices at Al Jazeera. According to the research, attackers targeted and infected these devices with Candiru spyware through this method.
The attack may involve several stages, beginning with the delivery of malicious code through advertisements. Attackers can then identify selected devices and exploit vulnerabilities in browsers, applications, or operating systems.
These security flaws may provide unauthorized access to targeted devices, depending on the vulnerabilities involved.
However, National CERT clarified that viewing an advertisement alone does not establish that a device has been targeted or compromised.
What Information Could Spyware Access?
National CERT has warned that a successful spyware infection could expose sensitive information stored on affected devices.
This may include private conversations, photographs, personal files, account passwords, and other confidential data. Consequently, compromised devices could become a source of unauthorized surveillance and information theft.
The advisory also highlighted the possibility of device takeover and data leaks involving government departments, businesses, research institutions, and media organizations.
However, the extent of potential damage depends on several factors. These include the security vulnerabilities exploited, the device’s software version, and the capabilities of the spyware involved.
Therefore, users should take the warning seriously without assuming that every advertisement poses an immediate threat.
How Can Users Protect Their Phones From Ad-Based Spyware?
National CERT has recommended several security measures to reduce the risk of spyware infections. Users should follow these precautions to strengthen their mobile device security.
- Update operating systems: Install the latest security updates to address known vulnerabilities.
- Keep browsers updated: Regularly update internet browsers and mobile applications to improve protection.
- Use supported devices: Choose devices that continue receiving regular security updates from manufacturers.
- Download trusted applications: Install applications only through reliable and official sources.
- Enable multi-factor authentication: Add another layer of security to important online accounts.
These precautions can help reduce exposure to known security weaknesses. However, users should also remain alert to unusual device activity.
What Should Organizations Do to Prevent Spyware Attacks?
National CERT has also advised organizations to strengthen their cybersecurity arrangements against advertisement-based spyware campaigns.
Organizations should consider ad-blocking solutions and browser-level security protections to reduce exposure to malicious advertisements. Additionally, they should preserve security logs and improve monitoring across organizational devices.
The agency also recommended seeking specialist digital forensics assistance when organizations suspect a spyware infection or targeted cyberattack.
Furthermore, credible signs of spyware activity and targeted cyber incidents can be reported through National CERT’s official incident-reporting mechanism.
The warning reinforces the importance of proactive cybersecurity practices as attackers continue exploring new ways to compromise digital devices. Since some attacks may require no user interaction, keeping devices updated and strengthening security protections remain essential.
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