Vulnerability Trends Summary

As part of our monthly vulnerability trends, this report shows the monthly top 10 trends on security vulnerabilities and how hackers, malware, and exploit kits are exploiting those vulnerabilities. To demonstrate, we assign vulnerability trends value as a percentage of how each vulnerability is significantly gaining the attention of cybersecurity communities, attackers, together with malware. In either case, companies can benefit from the report to have more cyber threat insights and relatively anticipate attacks wave that might target their public assets in the following months.

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The following chart shows the trends.

In August 2021 there are no major vulnerabilities that hijacked all community attentions. However, still critical vulnerabilities are hitting the Windows Print Spooler service.

Other important vulnerabilities were disclosed in some IoT devices, Cisco Routers, and OpenSSL.

The following table shows the details of the trends.

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1. CVE-2021-26084 Confluence Server RCE

OGNL (Object-Graph) injection vulnerability exists that would allow an authenticated user, and in some instances an unauthenticated user, to execute arbitrary code on a Confluence Server or Data Center instance.

2. CVE-2021-36958 RCE in Windows Print Spooler Service

Remote Code Execution vulnerability exists in Windows Print Spooler service. This vulnerability is different than the previous ones.

3. CVE-2021-39137 Consensus Vulnerability in Go-Ethereum 

The library go-ethereum is the official Go implementation of the Ethereum protocol. In affected versions, a consensus vulnerability in go-ethereum (Geth) could cause a chain split, where vulnerable versions refuse to accept the canonical chain.

4. CVE-2021-28372 Credential Leak in TUTK device 

ThroughTek’s Kalay Platform 2.0 network allows an attacker to impersonate an arbitrary ThroughTek (TUTK) device given a valid 20-byte uniquely assigned identifier (UID). This could result in an attacker hijacking a victim’s connection and forcing them into supplying credentials needed to access the victim’s TUTK device.

5. CVE-2021-22937 Code Execution in Pulse Connect Secure 

A vulnerability in Pulse Connect Secure could allow an authenticated administrator to perform a file write via a maliciously crafted archive uploaded in the administrator web interface.

6. CVE-2021-35395 Realtek APRouter SDK Remote Code Execution

Buffer overflow vulnerability exists in Realtek ARPRouter SDK that causes remote code execution in the devices that utilize this SDK.

7. CVE-2021-34730 Denial of Service in Cisco Routers

A vulnerability in the Universal Plug-and-Play (UPnP) service of Cisco Small Business Routers could allow an unauthenticated, remote attacker to execute arbitrary code or cause an affected device to restart unexpectedly, resulting in a denial of service (DoS) condition.

8. CVE-2021-30563 Elevation of Privilege in Windows

An actively exploited vulnerability exists in the Windows Update Medic service that allows an elevation of privileges.

9. CVE-2021-33910 Code Execution in OpenSSL

In OpenSSL SM2 decryption code has a buffer overflow that leads to code execution when calling the API function to decrypt SM2 encrypted data.

10. CVE-2021-36936 RCE in Windows Print Spooler

Again, a vulnerability exists in the Windows Pring Spooler servicer that leads to remote code execution. The relation with the last month’s RCE (CVE-2021-34527) is not clear.

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