Half of Mobile Devices Run on Outdated Systems, Increasing Cyberattack Risks

In today’s fast-paced digital world, mobile security is often overlooked — but the consequences are growing more serious by the day. New research reveals a troubling reality: half of all mobile devices are running on outdated operating systems, exposing users and corporations alike to a rising tide of cyber threats.

The 2025 Global Mobile Threat Report by Zimperium paints a clear and concerning picture. As mobile devices become more embedded in business operations, they are simultaneously becoming major targets for cybercriminals. Attack methods like smishing (SMS phishing) are soaring, and app vulnerabilities are leaving sensitive data dangerously unprotected.
This article delves into the key findings from the report, highlights the most alarming trends, and examines why mobile security needs immediate and serious attention.

Key Insights from the 2025 Global Mobile Threat Report

Mobile security is now a front-line issue, with a surge in targeted attacks, outdated systems, and insecure apps leading the charge:

Half of mobile devices globally are running on outdated operating systems, lacking critical security patches.
Over 25% of devices cannot upgrade to the latest OS versions at all, leaving them permanently exposed.
Smishing (SMS phishing) now accounts for an astonishing 69.3% of all mobile phishing attacks.
Vishing (voice phishing) and smishing attacks have risen sharply, by 28% and 22% respectively.
A significant number of apps are also at risk:
60% of iOS apps and 34% of Android apps have no basic code protection.
58% of iOS apps and 43% of Android apps are vulnerable to PII (Personally Identifiable Information) data leakage.
Malware threats are intensifying, with a 50% year-over-year increase in Trojan activity.
New malware strains, including Vultur, DroidBot, Errorfather, and BlankBot, have been identified.
Applications downloaded outside official stores (via sideloading) pose severe risks due to lack of proper security vetting.
Even internally developed apps are showing vulnerabilities, mainly due to design flaws, insecure APIs, and weak security measures.

Experts strongly recommend adopting real-time threat detection, regular patching, and zero-trust security models to protect mobile environments from these expanding threats.

What Undercode Say:

The findings from Zimperium’s 2025 report are a wake-up call for the digital world. Outdated mobile operating systems represent one of the most glaring vulnerabilities in today’s cybersecurity landscape. It’s no longer just a personal risk — it’s a corporate and national security concern.

The fact that over a quarter of mobile devices are incapable of even upgrading to the latest software versions underscores a deep-rooted problem: hardware limitations and manufacturer support timelines are lagging behind the speed at which cyber threats evolve. As a result, a significant portion of the global mobile population is left permanently exposed to exploitation.

Moreover, the surge in smishing and vishing attacks shows that cybercriminals are adapting. They understand that while email security protocols have strengthened, mobile messaging platforms remain softer targets. The heavy use of mobile devices in professional environments further amplifies the impact when breaches occur — confidential corporate data, financial transactions, and personal information can all be compromised through a single device.

Another layer of concern lies within mobile apps themselves. The revelation that a majority of iOS and Android apps lack fundamental security protections should trigger immediate action among developers and businesses. With APIs increasingly serving as critical links between mobile apps and backend systems, insecure API usage acts like an open door for cybercriminals.

The rise of new malware families like Vultur and DroidBot also suggests an evolution toward more specialized and sophisticated threats. These aren’t broad, spray-and-pray attacks; they are targeted, persistent, and extremely damaging.

Additionally, sideloading apps — often seen as a convenience or necessity — is a major weak point. By circumventing official app stores, users bypass essential security checks, effectively gambling with their device’s safety. Organizations must, therefore, educate their teams about these risks and implement mobile device management (MDM) solutions that prevent or control sideloading behaviors.

The cybersecurity community must push for better OS support policies, encourage timely updates, and advocate for stronger app development security standards. Likewise, companies should invest more heavily in real-time mobile threat monitoring and consider applying zero-trust principles to their mobile strategies.

In conclusion, ignoring the vulnerabilities of mobile platforms is no longer an option. As mobile devices continue to dominate both personal and business spheres, securing them must be viewed as a priority — not an afterthought.

Fact Checker Results:

✔️ Research from Zimperium’s 2025 report confirms that 50% of devices operate on outdated OS versions.
✔️ Smishing now represents 69.3% of all mobile phishing incidents, validating a shift toward mobile-targeted scams.
✔️ The explosion in malware families and insecure app development highlights a major systemic security issue in mobile ecosystems.