A working exploit called AnyPwn has been reported for a pre-authentication flaw in AnyDesk for Linux. The exploit targets version 8.0.2 and can execute an attacker-supplied command as root over a direct TCP connection on port 7070. The report identifies AnyDesk Linux 8.0.3 as the fixed release; AnyDesk’s Linux changelog listed 8.1.0 as the latest version on October 9, 2026. Administrators should update to a current supported release. If they cannot update promptly, restrict access to TCP 7070 as an interim measure.
What the reported flaw allows
According to The Hacker News report published October 9, 2026, the vulnerability is a heap buffer overflow in AnyDesk’s Linux session protocol. It can allow code execution before a remote connection is approved, with the demonstrated exploit running a command as root.
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The publicly released exploit’s offsets target AnyDesk Linux 8.0.2. The report says earlier versions may share the vulnerable code path, but does not confirm that they can be exploited. Do not treat every older build as a verified target.
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How the exploit reportedly works
The report describes a flaw in handling mode-5 stream packets. The handler adds a 16-byte header to the declared payload length using 32-bit arithmetic without checking for overflow. A declared length of 0xFFFFFFF0 plus 0x10 wraps to zero, leading to an allocation smaller than the packet data requires. A subsequent write can go beyond that allocation into neighboring heap objects.
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The researchers’ exploit reportedly corrupts adjacent object fields and uses a return-oriented programming (ROP) chain to execute a command as root. The demonstration is probabilistic: an unfavorable heap layout can make the service crash instead of executing the command. These mechanics are attributed to the report and researchers; the exploit repository was not independently reviewed for this account.
Which connections and systems are in scope
Direct Linux connections
The demonstrated exploit works over a direct TCP connection on port 7070. AnyDesk’s statement, quoted through The Hacker News, says the vulnerability is “limited to direct connections on Linux (connections that do not go through our relays). Windows and macOS are not affected.” The report does not identify a named spokesperson for that statement.
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Relay connections remain unresolved
The researchers reportedly triggered the vulnerable code path through relay servers, but did not demonstrate the complete exploit chain through a relay. That leaves a distinction between reaching the path and proving successful exploitation via relay; the report does not establish the latter.
Which versions need attention
The exploit targets Linux 8.0.2. The report identifies 8.0.3 as patched, and AnyDesk’s changelog records these release dates and notes:
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| AnyDesk Linux version | Changelog date | Relevant detail |
|---|---|---|
| 8.0.2 | April 1, 2026 | Targeted by the public exploit, according to The Hacker News. |
| 8.0.3 | June 23, 2026 | Changelog says: “Fixed a bug that could lead to a crash.” The report identifies this as the fixed release. |
| 8.0.4 | June 30, 2026 | Later release listed in the changelog. |
| 8.1.0 | September 23, 2026 | Latest release listed in the changelog as of October 9, 2026. |
The 8.0.3 changelog wording does not label the change a security fix. The release history is available in AnyDesk’s official Linux changelog. Version availability can change; the 8.1.0 latest-version observation is specific to October 9, 2026.
What Linux administrators should do
- Check installed versions. Identify every Linux host running AnyDesk, then verify its installed version using the package manager or deployment inventory appropriate to that system.
- Update. Install at least 8.0.3, the release the report identifies as patched. Prefer the current supported AnyDesk Linux release available from AnyDesk rather than treating 8.0.3 as a timeless recommendation.
- If an update is delayed, restrict TCP 7070. Limit inbound access to the port at the host firewall or network boundary to trusted sources, or block it where direct connections are not required. Confirm the rule matches the actual exposure in your deployment; the report gives no firewall-specific commands.
- Review exposure and service health. Prioritize systems reachable over direct TCP 7070 and check for unexpected AnyDesk service crashes. A crash can be a failed exploit attempt, but the report does not establish that crashes alone indicate an attack.
Restricting the port is an interim reduction in exposure, not a substitute for installing the fixed release.
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Disclosure and advisory status
The Hacker News credits discovery to Rick de Jager of the V12 security team and says the team announced the flaw on June 22, 2026. The report says AnyDesk acknowledged it the following day and released 8.0.3 on June 23; the public exploit appeared on GitHub on October 8.
As of the report’s October 9, 2026 publication, no CVE had been assigned and AnyDesk had not published a formal security advisory. The available changelog entry is the crash-related wording shown above, rather than a detailed security notice.
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