Microsoft · Security update · July 13, 2021
KB5004307: July 2021 security update
KB5004307, released July 13, 2021, fixes 35 CVEs across 4 products. One of them is being exploited (CVE-2021-31979); 1 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported.
Patch now1 on CISA KEV1 publicly disclosedUnsupported product
CVEs closed
35
1 rated Critical
Exploited
1
CVE-2021-31979
Exploitation more likely
1
Microsoft's assessment
Highest EPSS
0.1379
96th percentile
Priority of the 35 CVEs
Patch now 1
Urgent 2
High 20
Routine 12
Applies to
CVEs this fix closes
| Priority | CVE | Component | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| Patch now | CVE-2021-31979 | Windows Kernel | Elevation of Privilege | 7.8 | 0.0454 | KEVExploited |
| Urgent | CVE-2021-34494 | Role: DNS Server | Remote Code Execution | 8.8 | 0.0405 | Exploitation Less Likely |
| Urgent | CVE-2021-33780 | Role: DNS Server | Remote Code Execution | 8.8 | 0.0271 | More likely |
| High | CVE-2020-17049 | Microsoft Windows | Security Feature Bypass | 7.2 | 0.1379 | Exploitation Less Likely |
| High | CVE-2021-31183 | Windows TCP/IP | Denial of Service | 7.5 | 0.0384 | Exploitation Less Likely |
| High | CVE-2021-34504 | Windows Address Book | Remote Code Execution | 7.8 | 0.0347 | Exploitation Less Likely |
| High | CVE-2021-33788 | Windows Local Security Authority Subsystem Service (LSASS) | Denial of Service | 7.5 | 0.0328 | Exploitation Less Likely |
| High | CVE-2021-34476 | Common Internet File System | Denial of Service | 7.5 | 0.0328 | Exploitation Less Likely |
| High | CVE-2021-34442 | Role: DNS Server | Remote Code Execution | 8.8 | 0.0317 | Exploitation Less Likely |
| High | CVE-2021-34492 | Windows PFX Encryption | Spoofing | 8.1 | 0.0247 | DisclosedExploitation Less Likely |
| High | CVE-2021-33749 | Role: DNS Server | Remote Code Execution | 8.8 | 0.0242 | Exploitation Less Likely |
| High | CVE-2021-33750 | Role: DNS Server | Remote Code Execution | 8.8 | 0.0242 | Exploitation Less Likely |
| High | CVE-2021-33752 | Role: DNS Server | Remote Code Execution | 8.8 | 0.0242 | Exploitation Less Likely |
| High | CVE-2021-33756 | Role: DNS Server | Remote Code Execution | 8.8 | 0.0241 | Exploitation Less Likely |
| High | CVE-2021-34441 | Microsoft Windows Media Foundation | Remote Code Execution | 7.8 | 0.0222 | Exploitation Less Likely |
| High | CVE-2021-33786 | Windows Local Security Authority Subsystem Service (LSASS) | Security Feature Bypass | 8.1 | 0.0212 | Exploitation Less Likely |
| High | CVE-2021-33746 | Microsoft Windows DNS | Remote Code Execution | 8.0 | 0.0200 | Exploitation Less Likely |
| High | CVE-2021-33754 | Microsoft Windows DNS | Remote Code Execution | 8.0 | 0.0198 | Exploitation Less Likely |
| High | CVE-2021-34516 | Windows Win32K | Elevation of Privilege | 7.8 | 0.0130 | Exploitation Less Likely |
| High | CVE-2021-34498 | Microsoft Graphics Component | Elevation of Privilege | 7.8 | 0.0106 | Exploitation Less Likely |
| High | CVE-2021-34514 | Windows Kernel | Elevation of Privilege | 7.8 | 0.0070 | Exploitation Less Likely |
| High | CVE-2021-34511 | Windows Installer | Elevation of Privilege | 7.8 | 0.0057 | Exploitation Less Likely |
| High | CVE-2021-34456 | Windows Remote Access Connection Manager | Elevation of Privilege | 7.8 | 0.0056 | Exploitation Less Likely |
| Routine | CVE-2021-34444 | Role: DNS Server | Denial of Service | 6.5 | 0.0346 | Exploitation Less Likely |
| Routine | CVE-2021-34507 | Windows Remote Assistance | Information Disclosure | 6.5 | 0.0326 | Exploitation Less Likely |
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