CVE-2026-20302

MEDIUM 6.1 ALL-YEARS

Published 2026-08-19 · Last modified 2026-08-20 · cisco · NVD: Awaiting Analysis

A vulnerability in the USB driver of Cisco RoomOS could allow an unauthenticated, local attacker with physical access to the USB port on an affected device to execute arbitrary code with root privileges. This vulnerability is due to insufficient boundary checks for specific data that is provided through the USB driver. An attacker could exploit this vulnerability by connecting a malicious USB device to an affected device. A successful exploit could allow the attacker to cause a buffer overflow condition on the affected system and execute arbitrary code with root privileges.

LIMITED SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

0.2%chance of exploitation in 30 days · 14th percentile

○ In CISA KEV○ Catalogued PoC◆ SSVC: exploitation none, automatable no

Impact if exploited

6.1CVSS 3.1 · MEDIUM · CNA

ConfidentialityHigh
IntegrityHigh
AvailabilityNone

What an attacker needs

⚠Access: Requires physical access to the device
✓Privileges: No account or privileges required
✓User interaction: No user interaction needed
✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

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Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Affected

Vendors Cisco

Products Cisco Roomos Software

Weakness (CWE)

CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CVSS vector

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References and research data (JSON)

All CVSS metrics

MEDIUM 6.1 v3.1 · CNA Primary
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
MEDIUM 6.1 v3.1 · NVD Secondary
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References

Advisories

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-62563 ADVISORYEUVD · EUVD-2026-62563

Technical & other

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-roomos-bof-vTMANZguCVE record · cisco · Updated 2026-08-19T16:17:07.749Z
NVD · CVE-2026-20302 · Updated 2026-08-20T16:17:20.827

Sources: NVD · CVE.org · All sources and attribution · EPSS