CVE-2021-44426 json
An issue was discovered in AnyDesk before 6.2.6 and 6.3.x before 6.3.5.
published 2022-09-12 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-31267
- cvss
- 8.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.2%
- EPSS 1.2% chance of exploitation in 30 days, percentile 67%
- public exploits
- 0
- none known
Summary
An issue was discovered in AnyDesk before 6.2.6 and 6.3.x before 6.3.5. An upload of an arbitrary file to a victim's local ~/Downloads/ directory is possible if the victim is using the AnyDesk Windows client to connect to a remote machine, if an attacker is also connected remotely with AnyDesk to the same remote machine. The upload is done without any approval or action taken by the victim.
Patch / fix
- anydesk anydesk 6.2.6, 6.3.3
Exploit prediction
1.18% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- argus-sec.com https://argus-sec.com/discovering-tunneling-service-security-flaws-in-anydesk-remote-application/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
-
argus-sec.com
/discovering-tunneling-service-security-flaws-in-anydesk-remote-application/
exploit, third-party-advisory
-
anydesk.com
/en/downloads/windows
product, vendor-advisory
Sources
- CVE List CVE-2021-44426
- NVD CVE-2021-44426
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.