MS Paint Remote Code Execution Vulnerability

(cve.org)

145 points | by kuberwastaken 1 hour ago

14 comments

  • greyhound1 0 minutes ago
    Had to go to Microsoft Store to get the fixed version, Windows Update didn't show anything.
  • Oarch 27 minutes ago
    I can't wait for the Raymond Chen write up one day.
  • everylostbit 16 minutes ago
    This seems to affect only paint 11.0.0.0 up to, but not including, 11.2605.91.0. For folks like me, running a much older version, its probably safe, although its Windows so, I'm not too sure.
  • patrick_rtk 6 minutes ago
    wow thoses days are amazing. cve: AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

    UI:N it is with no interaction ?

    is it a cve mistake ?

  • ajasmin 31 minutes ago
    What Network?
    • hoppp 23 minutes ago
      It's probably a way to get phished, if you click on a malicious bmp file.
  • layer8 1 hour ago
    Fixed in version 11.2609.401.0.
  • TZubiri 58 minutes ago
    >Exploit Code Maturity

    >Unproven

    >Remediation Level

    >Official Fix

    >Report Confidence

    >Confirmed

    I really like these secondary scoring factors, not just scoring the vuln itself, but how it's being attacked.

  • falcor84 1 hour ago
    Wow! At first sight I was sure it was a joke, but no. What a time...

    https://msrc.microsoft.com/update-guide/vulnerability/CVE-20...

    • dist-epoch 12 minutes ago
      This site doesn't do jokes
    • dboreham 1 hour ago
      Presumably this is like many other graphics tool vulnerabilities this works by the attacker persuading a user to open a file that exercises the bug. Not terribly unusual.
      • yread 1 hour ago
        I don't think so:

        > User Interaction: None

        > Out-of-bounds read in Windows Paint allows an unauthorized attacker to execute code over a network.

        • criddell 1 hour ago
          > An unauthenticated attacker could exploit this vulnerability by sending a specially crafted packet to an affected service over the network.

          What server is MS Paint running or what services does it provide?

          Edit: Apparently you can use it to print an image from the command-line. Is that how this is being exploited?

          • 80fj0348i 48 minutes ago
            MS Paint has Copilot now
            • criddell 37 minutes ago
              Does that turn it into a server or service?
              • 80fj0348i 1 minute ago
                I'm no expert but so much of Windows is implemented as services. svchost.exe is probably involved somehow
          • lakeviewterrace 55 minutes ago
            IIS (Internet Impasto Server)
    • stygiansonic 1 hour ago
      When they find a CVE RCE in minesweeper then you know it’s all over
      • mhh__ 13 minutes ago
        Does windows even have minesweeper anymore
      • linux2647 32 minutes ago
        Turns out we were sweeping for CVEs, not mines, all along
    • lakeviewterrace 50 minutes ago
      Of course the valuable link is down-weighted/buried in the HN discussion...

        >Publicly disclosed
        >No
      
        >Exploited
        >No
      
        >Exploitability assessment
        >Exploitation Less Likely
  • tosti 1 hour ago
    Code execution, sure, paint has been used to write executable code too, so why not.

    But remote? How

    • gregschlom 1 hour ago
      "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?

      • IanCal 1 hour ago
        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?
      • nonethewiser 1 hour ago
        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

        • advisedwang 9 minutes ago
          That's... that's not RCE though.
        • autoexec 14 minutes ago
          Sounds like it might be opening a file that was sent over the network without any user interaction.
        • eqvinox 7 minutes ago
          Reading tea leaves is still reading tea leaves, even if you make an AI do it… (which is what this is, judging by other things I've seen on opencve.io)
      • Den_VR 1 hour ago
        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
    • VorpalWay 1 hour ago
      I'm thankfully out of the loop on Windows these days, but as I remember it Paint did not have any network features? Is that still true? If if is, maybe it is a misfiling of the CVE and it isn't remote?

      Or are they chaining a browser auto opening a download in paint, (but browsers shouldn't do that)...

      • kuboble 1 hour ago
        These days paint has copilot...
        • robotnikman 1 hour ago
          This is the only network feature paint has iirc, so that's probably it.
        • radicalbyte 48 minutes ago
          Why for the love of everything that is good does MS Paint have network trash in it. It's a super simple bitmap editor. Like Notepad, it's simple and just works.

          Make a new product and bundle that as an option if you want to drastically change the functionality.

          • waz0wski 45 minutes ago
            Hate to break it to you..

            > Notepad in Windows includes AI features powered by Copilot that help refine and shorten text with the assistance of GPT. By default, these AI features are enabled on managed devices

            https://learn.microsoft.com/en-us/windows/client-management/...

            • SV_BubbleTime 32 minutes ago
              > Like Notepad, it's simple and just works.

              I mean… what else were the people working on Notepad and Paint to do!?

              The order came down to integrate AI, and they wanted to be promoted.

              Every single day I’m happier and happier than I use Linux now.

    • TZubiri 1 hour ago
      Maybe because a .bmp file could be sent remotely.

      Or maybe after the .bmp file is executed, it can install something that opens an outbound TCP connection to its C2, and thus can receive commands. Would not need admin privileges because it doesn't open a port, just 'outbound' connections, like a long-poll.

    • Sohcahtoa82 50 minutes ago
      Because the definition of "remote" has been expanded in the name of resume-driven development to include sending a malicious file that a victim has to open.
  • caust1c 8 minutes ago
    Looking forward to the CALC.EXE RCE next, so we can pop calc while we pop calc!
  • itopaloglu83 17 minutes ago
    First the notepad CVE and now this, Microsoft is on a roll.
  • arm32 56 minutes ago
    Patch your MS Paint, everybody!
  • mmargenot 20 minutes ago
    no my beloved
  • rarisma 46 minutes ago
    rce in paint i guess bro