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gregschlom • yesterday at 9:15 PM • 4 replies • view on HN

"An unauthenticated attacker could exploit this vulnerability by sending a specially crafted packet to an affected service over the network. Successful exploitation could allow the attacker to execute code on the target system. No authentication or user interaction is required.."

Still, the question remains... How?


Replies

IanCal • yesterday at 9:22 PM

It mentions that it may rely on other services or security measures running- I wonder if there’s something like this hitting a firewall or av and then that calling out to paint to check file type or size out something like that?

zmmmmm • today at 12:28 AM

It still makes it sound like the problem really is the other service that is letting a remote connection invoke some part of MS paint.

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nonethewiser • yesterday at 9:19 PM

Sounds like they just mean opening a file that you got from somewhere else.

>The CVSS score of 8.1 marks this as a high‑severity RCE. The EPSS score is not available, and the vulnerability is not listed in CISA’s KEV catalog. Based on the description, the likely attack vector is remote: an attacker can deliver the malicious file over a network connection, for example via Remote Desktop, file shares, or other network‑exposed services that allow users to open images. The lack of EPSS data does not diminish the threat posed by a known RCE, but it does make precise likelihood estimation difficult.

https://app.opencve.io/cve/CVE-2026-83844

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Den_VR • yesterday at 9:25 PM

The direct implication is that current generations of ms paint are a “service over the network.” Probably a theoretically possible RPC end point of svchost.exe