CVE-2021-34521 — Raw Image Extension Remote Code Execution Vulnerability

Executive Summary

None

Overview

7.8

CVSS HIGH

Important

MS Severity

Not Exploited

MS Exploit Status

Less Likely

MS Exploit Likelihood

Category Remote Code Execution

Released Jul 13 2021

Last Updated Jul 13 2021

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

NVD CVSS 7.8 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

ATTACK VECTOR

Local

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

None

USER INTERACTION

Required

SCOPE

Unchanged

CONFIDENTIALITY

High

INTEGRITY

High

AVAILABILITY

High

EXPLOIT CODE MATURITY

Unproven

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 6.8

EPSS Score

No EPSS score available for this CVE.

View on FIRST.org

Affected Products

8 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows 10 Version 1909 for x64-based Systems	`5004245 (Security Update)`	Important	Remote Code Execution	Yes
Windows 10 Version 1909 for ARM64-based Systems	`5004245 (Security Update)`	Important	Remote Code Execution	Yes
Windows 10 Version 21H1 for x64-based Systems	`5004237 (Security Update)`	Important	Remote Code Execution	Yes
Windows 10 Version 21H1 for ARM64-based Systems	`5004237 (Security Update)`	Important	Remote Code Execution	Yes
Windows 10 Version 21H1 for 32-bit Systems	`5004237 (Security Update)`	Important	Remote Code Execution	Yes
Windows 10 Version 20H2 for 32-bit Systems	`5004237 (Security Update)`	Important	Remote Code Execution	Yes
Windows 10 Version 20H2 for ARM64-based Systems	`5004237 (Security Update)`	Important	Remote Code Execution	Yes
Windows Server, version 20H2 (Server Core Installation)	`5004237 (Security Update)`	Important	Remote Code Execution	Yes

Patches

2 patches

Article	Type	Restart
`5004245`	Security Update	Yes
`5004237`	Security Update	Yes

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

This vulnerability was discovered by Wayne Low of Fortinet’s FortiGuard Lab

References

MSRC Advisory MITRE NVD