CVE-2026-20281
A remote, anonymous attacker can exploit a vulnerability in Cisco IP Phone to conduct a Denial of Service attack.
CSIRTS triage
- What
- A remote vulnerability in Cisco IP Phone allows unauthenticated attackers to conduct denial of service attacks.
- Who is affected
- Deployments of Cisco IP Phone systems accessible over the network.
- Urgency
- Medium severity; no active exploitation reported, but DoS attacks can disrupt communications infrastructure.
- Action
- Apply vendor security patches when available; restrict network access to IP phones if feasible.
AI-assisted analysis generated from the source advisory — verify against the original.
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Advisory coverage (4)
- medium[NEW] [medium] Cisco IP Phone: Vulnerability enables Denial of Servicecert-bund · 2026-09-03
- highCVE-2026-20281: A vulnerability in Cisco Desk Phone 9800 Series, Cisco IP Phone 7800 and 8800 Series, and Cisc…nvd · 2026-09-02
- criticalCisco Advance Notification for Publication of September 2, 2026, Security Advisoriescisco-psirt · 2026-09-02
- highCisco Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, and Video Phone 8875 with SIP Software Denial of …cisco-psirt · 2026-09-02
External references
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