CVE-2026-48561

CRITICAL 9.6 ALL-YEARS

Published 2026-07-14 · Last modified 2026-10-08 · microsoft · NVD: Modified

Improper neutralization of special elements used in a command ('command injection') in Copilot Chat (Microsoft Edge) allows an unauthorized attacker to execute code over a network.

ELEVATED IMPACT

Severe if exploited (CVSS 9.6), but no confirmed exploitation. Patch on a normal cadence.

Exploitation likelihood

0.9%chance of exploitation in 30 days · 58th percentile

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

Impact if exploited

9.6CVSS 3.1 · CRITICAL · CNA

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

What an attacker needs

✓Access: Reachable over the network — no local access needed
✓Privileges: No account or privileges required
⚠User interaction: A user must take an action (click / open a file)
✓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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Affected

Vendors Microsoft

Products Microsoft Edge Copilot For Android Microsoft Edge Copilot For Ios 365 Copilot

Weakness (CWE)

CWE-77: : Improper Neutralization of Special Elements used in a Command ('Command Injection')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C

References and research data (JSON)

Known Affected Software Configurations

Vendor	Product	Version range
Microsoft	365 Copilot	*
Microsoft	365 Copilot	*

All CVSS metrics

CRITICAL 9.6 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
CRITICAL 9.6 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

References

Patches & mitigations

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48561 vendor-advisorypatchVendor AdvisoryCVE record · microsoft · Updated 2026-10-08T18:12:32.974Z
NVD · CVE-2026-48561 · Updated 2026-07-26T18:17:38.233

Advisories

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-43965 ADVISORYEUVD · EUVD-2026-43965

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