MeridianMeridian

Telegram for Android Patches Voice Call Vulnerability Enabling Code Execution

Security researchers at NebuSec disclosed a vulnerability in Telegram for Android that allowed remote code execution after a victim answered a voice call. The flaw affected versions from 8.6.2 through 12.10.3 and was fixed in release 12.10.4 at the end of September. The issue stemmed from improper handling of MediaState service messages that carry microphone, camera, and video rotation data during calls. When a required field was missing, the application accessed invalid memory. NebuSec discovered the bug using its Code Security product running on a GPT-5.4 model and confirmed exploitation on ARM64 Android devices for personal calls. A demonstration showed the string “HACKED BY NEBUSEC” appearing roughly 30 seconds after the call was accepted. The vulnerability is unrelated to the earlier animated-sticker attack vector.

AntiMalwareTranslated from Russian

Read at source

Security researchers at NebuSec have disclosed a vulnerability in Telegram for Android that allowed remote code execution after a victim answered a voice call. The flaw affected versions from 8.6.2 through 12.10.3 and was fixed in release 12.10.4 at the end of September.

The issue stemmed from improper handling of MediaState service messages that carry microphone, camera, and video rotation data during calls. When a required field was missing, the application accessed invalid memory locations it should not have reached.

NebuSec discovered the bug using its Code Security product running on a GPT-5.4 model. The company confirmed successful exploitation on ARM64 Android devices for personal calls. In the published demonstration, the string “HACKED BY NEBUSEC” appeared on the victim’s screen roughly 30 seconds after the call was accepted.

Full technical details of the exploitation chain have not yet been released, and the exact scope of code execution remains unclear. No evidence of in-the-wild attacks has been provided. The vulnerability is unrelated to the earlier animated-sticker attack vector previously discussed in the community.

Users are advised to update Telegram for Android to version 12.10.4 or newer as soon as possible.

NebuSecMediaStateGPT-5.4ARM64
ShareXFacebookLinkedInReddit
Meridian digestThe week's most consequential security stories, distilled into one briefing.See the digest

More in Vulnerabilities & Exploits

Yandex Patches Millions of Stations After eMudhra Certificate Keys Compromised
Vulnerabilities & Exploits

Yandex Patches Millions of Stations After eMudhra Certificate Keys Compromised

Yandex has automatically deployed security updates to millions of its smart speakers and partner televisions running YaOS between October 21 and 23. The patches address compromised intermediate certificates issued by eMudhra whose private keys consisted of trivial values from 1 to 255. Attackers who obtained these keys could generate fraudulent certificates and perform man-in-the-middle attacks against device HTTPS traffic. Enthusiasts demonstrated that local network control combined with the certificates allowed replacement of server configuration, activation of ADB, and acquisition of root access on the devices. The update removes trust in the affected certificates, overwrites compromised system files, and disables the debug interface. A factory reset restores the vulnerable firmware, so Yandex advises against resets without a compelling reason.

AntiMalwareOct 29, 2026Translated from Russian

Cisco ASA and FTD Face DoS Vulnerability in SSL VPN Already Exploited in the Wild
Vulnerabilities & Exploits

Cisco ASA and FTD Face DoS Vulnerability in SSL VPN Already Exploited in the Wild

Cisco Systems has disclosed a denial-of-service vulnerability affecting its Cisco Secure Firewall ASA and Cisco Secure Firewall FTD products. The flaw, tracked as CVE-2026-76418, resides in the SSL VPN remote access feature and carries a CVSS v3.1 base score of 8.6, rated High severity. Exploitation occurs when secondary authentication is configured on tunnel groups, allowing an attacker to send a crafted request that forces a device reboot without requiring authentication. Cisco confirmed active exploitation of the issue in October 2026. Security updates addressing the vulnerability are now available for both affected product lines. The advisory recommends immediate application of the patches to prevent service disruption.

Security NEXTOct 29, 2026Translated from Japanese

Critical Pre-Auth RCE Vulnerability CVE-2026-118633 Affects All Sophos UTM Versions, Manual Patch Required After EOL
Vulnerabilities & Exploits

Critical Pre-Auth RCE Vulnerability CVE-2026-118633 Affects All Sophos UTM Versions, Manual Patch Required After EOL

Sophos has disclosed a critical remote code execution vulnerability in its legacy Sophos UTM security gateway product. The flaw, tracked as CVE-2026-118633, carries a CVSSv4.0 base score of 9.2 and is rated Critical. It allows unauthenticated attackers to execute arbitrary commands as root by triggering a race condition through repeated attacks against the email proxy when scanning is enabled. Although the product reached end-of-life, Sophos released a manual patch that users must apply themselves because automatic updates are no longer available. The company urges immediate patching for any deployments still using the email protection feature and recommends migration to the supported Sophos Firewall. The issue was reported through Sophos’s bug bounty program by an external researcher.

Security NEXTOct 29, 2026Translated from Japanese