CVE-2026-12058 Overview
CVE-2026-12058 is a security control bypass affecting Vivo PcSuite. The connection confirmation pop-up for a specific feature can be bypassed, allowing an adjacent network attacker to establish a connection without explicit user approval. The flaw is tracked under CWE-807, reliance on untrusted inputs in a security decision. Vivo disclosed the issue in its Vivo Security Advisory #23. Exploitation requires adjacency to the target network but does not require privileges or user interaction.
Critical Impact
An attacker on an adjacent network can bypass the connection confirmation prompt in Vivo PcSuite and proceed with a connection that should require explicit user consent.
Affected Products
- Vivo PcSuite (specific feature referenced in Vivo Security Advisory #23)
- Refer to the vendor advisory for the exact affected versions
- Devices paired with PcSuite over adjacent network channels
Discovery Timeline
- 2026-06-12 - CVE-2026-12058 published to the National Vulnerability Database
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2026-12058
Vulnerability Analysis
The vulnerability resides in the connection confirmation workflow of Vivo PcSuite. PcSuite is designed to prompt the user with a confirmation pop-up before completing a connection from a remote device using a specific feature. An attacker on an adjacent network can bypass this confirmation pop-up entirely. The result is that a connection proceeds without the user being given the opportunity to approve or deny it.
The issue maps to CWE-807, reliance on untrusted inputs in a security decision. The confirmation flow trusts data supplied during the connection handshake to determine whether the prompt must be shown. By controlling that input, an attacker influences the security decision and skips the user-consent step. Impact is limited to integrity (VI:L); confidentiality and availability are not directly affected by this bypass alone, though it removes a control that protects downstream actions.
Root Cause
The root cause is an authorization decision that depends on attacker-controlled inputs rather than a trusted, server-enforced state. The pop-up dispatch logic can be steered into a code path that treats the connection as pre-approved, suppressing the user-facing confirmation dialog.
Attack Vector
Exploitation requires the attacker to be on an adjacent network (AV:A), for example the same Wi-Fi segment or a Bluetooth/local discovery range used by the feature. No authentication and no user interaction are needed. The attacker issues a crafted connection request that satisfies the bypass condition, after which PcSuite establishes the connection without surfacing the confirmation prompt. No public exploit code is currently available, and the issue is not listed in the CISA Known Exploited Vulnerabilities catalog.
No verified proof-of-concept code is available. Refer to Vivo Security Advisory #23 for vendor-supplied technical detail.
Detection Methods for CVE-2026-12058
Indicators of Compromise
- PcSuite connections established on endpoints without a corresponding user-confirmation event in local application logs.
- Unexpected pairing or session activity originating from devices on the same Wi-Fi or local network segment.
- Outbound data transfers from the PcSuite-paired device that occur outside known user activity windows.
Detection Strategies
- Compare PcSuite session start events against UI interaction telemetry; sessions without a matching confirmation dialog event indicate a bypass.
- Monitor adjacent-network discovery and pairing traffic for repeated or scripted connection attempts targeting PcSuite services.
- Baseline normal PcSuite usage per user and alert on connections from previously unseen peer device identifiers.
Monitoring Recommendations
- Forward PcSuite application logs and host network telemetry to a centralized logging platform for correlation.
- Track local-network device inventories to flag new or rogue hosts attempting PcSuite service discovery.
- Review wireless infrastructure logs for unauthorized devices joining segments where PcSuite-paired endpoints operate.
How to Mitigate CVE-2026-12058
Immediate Actions Required
- Apply the fixed PcSuite version identified in Vivo Security Advisory #23 as soon as it is available for your build.
- Restrict use of PcSuite to trusted networks and disable the affected feature where it is not required.
- Audit currently paired devices and remove any that cannot be attributed to a legitimate user.
Patch Information
Vivo documents the remediation in Vivo Security Advisory #23. Administrators should consult the advisory for the specific PcSuite build that addresses CVE-2026-12058 and roll it out to all affected endpoints.
Workarounds
- Disable the specific PcSuite feature referenced in the advisory until the patched version is deployed.
- Operate PcSuite only on isolated or trusted network segments to reduce adjacent-network exposure.
- Use enterprise Wi-Fi client isolation to prevent peer-to-peer reachability between user devices on the same SSID.
- Require users to keep PcSuite closed when not in active use to shrink the exposure window.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
