PoC exploit for CVE-2021-1675 RCE started circulating online

Pierluigi Paganini June 29, 2021

Proof-of-concept exploit code for CVE-2021-1675 flaw, an attacker could exploit it to compromise Windows systems.

Proof-of-concept exploit code for the CVE-2021-1675 flaw has been published online, the flaw impacts the Windows Print Spooler service and could be exploited to compromise Windows systems.

Microsoft addressed the flaw with the release of Microsoft June 2021 Patch Tuesday security updates.

The vulnerability resides in Print Spooler (spoolsv.exe) service that manages the printing process, it impacts all Windows OS versions

CVE-2021-1675 was initially rated as a low-importance elevation-of-privilege vulnerability, but recently the IT giant reviewed the issue and labeled it as a remote code execution flaw.

Last week, researchers from Chinese security firm QiAnXin published a GIF showing a working exploit for the CVE-2021-1675 flaw, but avoided disclosing the technical details about the attack.

However, The Recod noticed that the availability of a fully working PoC exploit on GitHub earlier today, the code was likely accidentally published and the GitHub repo has been taken offline after a few hours.

“Authored by three analysts from Chinese security firm Sangfor, the write-up, which we will not link here, details how the trio discovered the bug independently from the teams who reported the vulnerability to Microsoft.” reported The Record.

It seems that the trio decided to publish the PoC aftet QiAnXin researchers shared the video of the CVE-2021-1675 exploit.

The experts removed the PoC a few hours later because they will present it at the Black Hat USA 2021 security conference later this year.


Unfortunately, it was too late because other users had access to the code before it was taken offline.

Threat actors will likely attempt to exploit the issue in attacks in the will in the next weeks.

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Pierluigi Paganini

(SecurityAffairs – hacking, CVE-2021-1675)

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