{"uuid": "ecd4d155-b419-4513-801b-6c7f5872b48b", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-40486", "type": "seen", "source": "https://t.me/hacking_Attack/27439", "content": "g that allowed threat actors to conduct remote code execution (RCE) and to gain local system privileges.\n\nThis month\u2019s release includes a fix for CVE-2021-36970, a spoofing vulnerability in Microsoft\u2019s Windows Print Spooler that has a CVSSv3 score of 8.8.\n\nChris Morgan, senior cyber threat intelligence analyst at Digital Shadows, said that the spoofing vulnerability fix Microsoft put out today is meant to fix the problems that previous patches have introduced.\n\n\u201cWhile Microsoft provided a fix in their September 2021 update,\u00a0the patch resulted in a number of management problems,\u201d he told Threatpost. \u201cCertain printers required users to repeatedly input their administrator credentials every time an application attempted to print or had a client connect to a print server.\n\n\u201cOther problems included event logs recording error messages and denying users the ability to perform basic prints\u201d he continued. \u201cAs a result, many may have likely skipped the update due to its operational impact, ultimately leaving the risk posed by PrintNightmare in place.\u201d\n\nThis vulnerability was discovered by researchers XueFeng Li and Zhiniang Peng of Sangfor, who were also credited with the discovery of CVE-2021-1675, one of two vulnerabilities known as PrintNightmare.\n\nSatnam Narang, staff research engineer at Tenable noted that \u201cWhile no details have been shared publicly about the flaw, this is definitely one to watch for, as we saw a constant stream of Print Spooler-related vulnerabilities patched over the summer while ransomware groups began incorporating PrintNightmare into their affiliate playbook. We strongly encourage organizations to apply these patches as soon as possible.\u201d\nSee Also: Apple Pay with VISA lets hackers force payments on locked iPhones RCE Affects Microsoft Word, Office, SharePointAnother vulnerability worth noting is CVE-2021-40486, a critical RCE affecting Microsoft Word, Microsoft Office and some versions of SharePoint Server that can be exploited via the Preview Pane.\n\nGina Geisel, Automox product and partner marketing professional, noted that this vulnerability isn\u2019t new to Microsoft, with several other similar CVEs documented this year. In this case, the RCE vulnerability exists in some Microsoft apps when they fail to properly handle objects in memory.\n\nWith a low attack complexity, this vulnerability requires a user opening a specially crafted file either by email or via a website, either hosted by the attacker or through a compromised website that accepts or hosts user-provided content.\n\n\u201cAn attacker who successfully exploits this vulnerability can use this file to perform actions in the context of the current user,\u201d Geisel explained. \u201cFor example, the file could take actions on behalf of the logged-on user with the same permissions as the current user.\u201d Microsoft SharePoint Server RCEImmersive Labs\u2019 Breen told Threatpost that this RCE vulnerability \u2013 tracked as CVE-2021-40487\u00a0rated as 8.1 out of 10 CVSS score and marked as \u201cexploitation more likely\u201d \u2013 will be more difficult for an attacker to exploit, given that it requires an authenticated user on the domain.\n\nBut gaining RCE on a SharePoint server \u201copens up a lot of avenues for further exploitation,\u201d he noted via email.\n\n\u201cInternal SharePoint servers are often used to host company-sensitive documents and provide an intranet for staff to interact with,\u201d Breen explained. \u201cIf an attacker could manipulate the content of these articles or replace valid documents with malicious ones, they could steal credentials or trick targeted users into installing additional malware.\u201d Highest CVSS Award Goes to Microsoft Exchange Server RCECVE-2021-26427, the latest in Exchange Server RCEs, takes the severity cake this month, with a CVSS score of 9.0 out of 10. In spite of this hgh severity rating, Microsoft has marked it as being \u201cexploitation less likely,\u201d perhaps due to the what Breen called the \u201cnetwork adjacent vector.\u201d\n\nIn other [...]\n\n___________________________ \n@hacking_Attack\n@Hacking_Video", "creation_timestamp": "2026-09-01T20:02:14.158655Z"}