CVE-2026-81735: bytedance UI-TARS-desktop

UI-TARS-desktop @agent-infra MCP Servers Bind Every Interface Without Authentication, Exposing Arbitrary Command Execution

CVSS 10.0 CriticalCriticalEPSS 0.0078 · 56th percentile

Critical, because:

CVSS score 10.0: 9.0 or more.

How we decide what’s critical

Published by the CVE Program (CNA: VulnCheck) at 27 Aug 2026, 14:51 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
bytedance	UI-TARS-desktop https://github.com/bytedance/UI-TARS-desktop	unaffected c2ad42e3eb9b27830db41a3e6f51ca7179d9b168 git affected before c2ad42e3eb9b27830db41a3e6f51ca7179d9b168 git Other versions: unaffected

Identifiers

CVE-2026-81735

CNA

VulnCheck

Weakness (CWE)

CWE-306

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
10.0	Critical	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H	CNA (VulnCheck)Used for this record
10.0	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0078, the 56th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 27 Aug 2026. New records show when each source confirmed them.

Sources

References from the CNA

github.com/bytedance/UI-TARS-desktop/pull/1918 issue-trackingpatch
github.com/bytedance/UI-TARS-desktop/commit/c2ad42e3eb9b27830db41a3e6f51ca7179d9b168 patch
github.com/bytedance/UI-TARS-desktop product
github.com/bytedance/UI-TARS-desktop/blob/e9f3387288da4af2ad99972da2ac916cdabce093/packages/agent-infra/mcp-http-server/src/startServer.ts#L263 technical-description
www.vulncheck.com/advisories/ui-tars-desktop-agent-infra-mcp-servers-bind-every-interface-without-authentication-exposing-arbitrary-command-execution third-party-advisory

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.