CVE-2026-117573: masc-ucsc hagent

hagent through commit 761eec6 OS Command Injection via Arduino and ESP32 MCP Tools

CVSS 8.5 HighEPSS 0.0070 · 53rd percentile

Published by the CVE Program (CNA: VulnCheck) at 27 Oct 2026, 13:08 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
masc-ucsc	hagent	affected 761eec627a1e6fb128a2a8ce9245aa595cc2f7af and earlier git Other versions: unaffected

Identifiers

CVE-2026-117573

CNA

VulnCheck

Weakness (CWE)

CWE-78

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
8.5	High	4.0	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	CNA (VulnCheck)Used for this record
7.8	High	3.1	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0070, the 53rd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

27 Oct 2026, 13:08 UTC Confirmed by the CVE List
27 Oct 2026, 14:16 UTC Confirmed by NVD

Sources

References from the CNA

github.com/masc-ucsc/hagent/issues/98 issue-tracking
github.com/masc-ucsc/hagent product
github.com/masc-ucsc/hagent/blob/761eec627a1e6fb128a2a8ce9245aa595cc2f7af/hagent/mcp/mcp_arduino.py#L776 technical-description
github.com/masc-ucsc/hagent/blob/761eec627a1e6fb128a2a8ce9245aa595cc2f7af/hagent/mcp/mcp_esp32.py#L682 technical-description
www.vulncheck.com/advisories/hagent-through-commit-761eec6-os-command-injection-via-arduino-and-esp32-mcp-tools 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.