A security vulnerability has been detected in Telegram Desktop up to version 6.7.5. This vulnerability allows for a null pointer dereference due to the manipulation of the argument login_url in the function RequestButton of the file Telegram/SourceFiles/boxes/url_auth_box.cpp within the Bot API component. The exploit has been disclosed publicly and may be used. Organizations should prioritize patching immediately.
The CVSS score for this vulnerability is 2.1, indicating a low severity level. While the exploitation complexity is low and does not require any privileges, it is essential to recognize that this vulnerability poses a risk to availability. The lack of vendor responsiveness to early disclosures further highlights the need for immediate action from organizations.
Risk to organizations includes potential disruption of services if exploited. Given that the attack can be initiated remotely, organizations utilizing Telegram Desktop should assess their exposure to this vulnerability and implement necessary mitigations.
Organizations should address this vulnerability in their priority patch cycle to minimize the risk of exploitation.
The vulnerability was published on May 3, 2026, and the status remains 'Received'. As of now, there are no publicly confirmed exploits available.
Organizations are encouraged to stay informed about vulnerabilities and their potential impacts through continuous monitoring and vulnerability management strategies.
Vulnerability Details
The specific vulnerabilities associated with CVE-2026-7701 include null pointer dereference as indicated by CWE-404 and CWE-476. The attack vector is classified as network, and the complexity is low, which implies that any attacker with access to the network can potentially exploit this vulnerability.
The CVSS score indicates a low impact on availability, while confidentiality and integrity impacts are rated as none. This assessment points to a vulnerability that, while not critical, should not be ignored.
Technical Analysis
The root cause of this vulnerability lies in the handling of the login_url argument within the RequestButton function. An attacker can manipulate this argument, leading to a null pointer dereference when the function is executed. This flaw allows for potential denial of service conditions.
The attack can be executed remotely without any privileges required, making it accessible to a wide range of potential attackers. The user interaction is passive, meaning that users do not need to engage with malicious content for the attack to succeed.
The impact of the vulnerability on availability is classified as low, indicating that while the service may be disrupted, the overall confidentiality and integrity of the system remain intact.
Risk & Impact Analysis
Real-world deployment risk for this vulnerability primarily revolves around potential service disruptions. Organizations utilizing Telegram Desktop should consider the implications of a successful exploit, which could lead to denial of service scenarios. Additionally, organizations should evaluate the potential blast radius, as the impact may extend to users relying on the application for communication.
Given the low severity score, the urgency for remediation can be categorized as moderate. Organizations should schedule remediation efforts in line with their patch management processes, particularly focusing on this vulnerability in the upcoming patch cycles.
Organizations should remain vigilant and consider implementing monitoring mechanisms to detect any anomalies that may indicate attempts to exploit this vulnerability.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
Telegram Desktop versions up to 6.7.5 are affected by this vulnerability. Organizations using these versions should take immediate action to update to the latest patched versions.
Mitigation & Remediation
To mitigate this vulnerability, organizations should apply patches as soon as they are available. In the absence of a patch, consider implementing network segmentation to limit access to the affected application and monitor for any unusual activity that may indicate attempts to exploit this vulnerability.
Organizations are encouraged to validate remediation through penetration testing to identify similar weaknesses.
Detection Guidance
To detect potential exploitation attempts of this vulnerability, organizations should monitor application logs for unusual access patterns, particularly related to the function RequestButton. Additionally, organizations should establish behavioral anomalies in user interactions with the application.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2026-7701 lies in the vulnerabilities present in widely used communication tools like Telegram. As organizations increasingly rely on such platforms for communication, the potential for disruption increases. This vulnerability serves as a reminder for security teams to prioritize security assessments of third-party applications.
Organizations should consider implementing a robust vulnerability management program to continuously assess and manage risks associated with their technology stack.
The trend of vulnerabilities affecting popular applications emphasizes the need for proactive security measures, including regular security audits and adherence to security best practices. Security teams must remain vigilant to address emerging threats effectively.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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