SecureCRT Memory Corruption Vulnerability (CVE-2020-12651) Threat Alert

SecureCRT Memory Corruption Vulnerability (CVE-2020-12651) Threat Alert

maio 22, 2020 | Adeline Zhang


A memory corruption vulnerability (CVE-2020-12651) was fixed in the latest version 8.7.2 of SecureCRT. When the CSI function receives a large negative number as a parameter, it may allow the remote system to destroy the memory in the terminal process, resulting in the execution of arbitrary code or the program crashes.

An attacker may exploit this vulnerability in a manner similar to the SSH banner.

Reference link:

Affected Versions

  • SecureCRT Version < 8.7.2

Unaffected Versions

  • SecureCRT Version >= 8.7.2


The vulnerability has been fixed in the latest version. Users are advised to update their software to prevent the preceding risk.

In addition, for hosts that cannot be fully trusted, avoid using terminal emulation software to connect, and beware of malicious hosts using vulnerabilities in terminal emulation software to harm the host.

Update link:

Download link:


This advisory is only used to describe a potential risk. NSFOCUS does not provide any commitment or promise on this advisory. NSFOCUS and the author will not bear any liability for any direct and/or indirect consequences and losses caused by transmitting and/or using this advisory. NSFOCUS reserves all the rights to modify and interpret this advisory. Please include this statement paragraph when reproducing or transferring this advisory. Do not modify this advisory, add/delete any information to/from it, or use this advisory for commercial purposes without permission from NSFOCUS.


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