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THE THREAT
Cisco has announced multiple vulnerabilities impacting Cisco Jabber, a unified communications solution, affecting Windows, MacOS and mobile platforms.
The highest impact vulnerability from this release is a Remote Code Execution (RCE) vulnerability affecting Windows devices, tracked as CVE-2021-1411 (CVSS: 9.9). A previously authenticated threat actor could exploit vulnerable Cisco Jabber versions to execute arbitrary code as the user running a vulnerable Jabber client in victim environments.
Organizations are strongly recommended to apply the security update from Cisco before exploitation is identified in the wild.
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Additional information
Vulnerabilities Announced:
None of the vulnerabilities listed in this advisory are known to be exploited in the wild or have functioning public Proof-of-Concept (PoC) exploit code at the time of writing. CVE-2021-1411 is likely to attract significant attention from both threat actors and security researchers.
References:
[1] https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cisco-jabber-PWrTATTC
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