CVE-2026-20281
Vulnérabilité élevée dans Cisco Session Initiation Protocol (SIP) Software (Cisco)
Description
A vulnerability in Cisco Desk Phone 9800 Series, Cisco IP Phone 7800 and 8800 Series, and Cisco Video Phone 8875 that are running Cisco Session Initiation Protocol (SIP) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper memory management when an affected device processes HTTP packets. An attacker could exploit this vulnerability by sending a continuous stream of crafted HTTP packets to the device. A successful exploit could allow the attacker to cause the affected device to continuously consume memory, resulting in a DoS condition. A manual reboot of the device is required to recover from this condition. Note: For this vulnerability to be exploitable, the phone must be registered to Cisco Unified Communications Manager (Unified CM) and have Web Access enabled. Web Access is disabled by default.
Gravité et risque d'exploitation
CVE-2026-20281 obtient un score CVSS de 7.5/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.37 %, ce qui la place devant 29.0 % des CVE référencées.
Que faire ?
- Vérifiez si Cisco Session Initiation Protocol (SIP) Software (versions 11.7(1), 3.6(1), 12.8(1), 11.0(5)SR3, 14.0(1)SR1, 2.3(1)SR1, 10.3(1.9) 3rd Party, 14.2(1)SR2, 3.5(1)SR1, 11.0(3)SR6, 3.2(1), 11.0(2)SR2, 3.1(1)SR1, 14.3(1)SR3, 14.3(1), 12.7(1), 12.6(1), 9.3(4) 3rd Party, 11.0(3)SR2, 10.3(1)SR3, 12.8(1)SR2, 11.0(4)SR3, 14.0(1)SR3, 11.0(6)SR2, 11.0(3)SR5, 11.0(2)SR1, 14.0(1), 12.7(1)SR1, 14.3(1)SR2, 11.0(5)SR1, 10.3(1)SR4, 11.0(0.7) MPP, 10.3(1)SR5, 14.1(1)SR1, 2.2(1), 4.1(1), 11.0(4)SR1, 9.3(4)SR2 3rd Party, 10.2(2), 14.1(1)SR3, 14.2(1)SR3, 10.3(1)SR1, 11.5(1)SR1, 10.3(1)SR6, 3.4(1), 11.0(2), 10.4(1) 3rd Party, 9.3(4)SR3 3rd Party, 3.5(1), 11.0(6)SR4, 11.0(3)SR4, 10.3(2), 14.2(1)SR1, 10.3(1), 11.0(3)SR3, 14.0(1)SR2, 10.4(1)SR2 3rd Party, 10.2(1)SR1, 14.1(1), 4.1(1)SR1, 4.0(1), 3.0(1), 3.3(1), 14.4(1), 12.6(1)SR1, 12.0(1)SR3, 12.5(1), 12.5(1)SR2, 11.0(6)SR1, 11.0(5)SR2, 14.3(1)SR1, 10.1(1.9), 11.0(4), 12.0(1)SR1, 11-0-1MSR1-1, 10.3(1)SR4b, 11.0(4)SR2, 14.2(1)SR4, 10.2(1), 12.0(1), 10.3(1)SR7, 11.0(3)SR1, 14.4(1)SR1, 11.0(5), 3.1(1), 14.4(1)SR2, 12.1(1)SR1, 10.1(1)SR2, 11.0(6)SR6, 10.3(1.11) 3rd Party, 9.3(4)SR1 3rd Party, 12.1(1), 10.3(1)SR2, 14.1(1)SR2, 11.0(6), 2.1(1), 11.5(1), 9.3(3), 12.8(1)SR1, 2.3(1), 14.2(1), 11.0(6)SR5, 10.1(1)SR1, 12.5(1)SR1, 12.0(1)SR2, 12.5(1)SR3, 11.0(6)SR7, 2.0(1), 11.0(1), 11.0(3)) est présent sur votre parc.
- Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
- À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
- Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.