7.5

CVE-2026-20281

Medienbericht

Cisco Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, and Video Phone 8875 with SIP Software Denial of Service Vulnerability

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerCisco
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Produkt Cisco Session Initiation Protocol (SIP) Software
Default Statusunknown
Version 12.1(1)SR1
Status affected
Version 11.5(1)
Status affected
Version 10.3(2)
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Version 10.2(2)
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Version 10.3(1)
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Version 10.3(1)SR4
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Version 11.0(1)
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Version 10.4(1)SR2 3rd Party
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Version 11.7(1)
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Version 12.1(1)
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Version 11.0(0.7) MPP
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Version 9.3(4) 3rd Party
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Version 12.5(1)SR2
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Version 10.2(1)SR1
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Version 9.3(4)SR3 3rd Party
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Version 10.2(1)
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Version 12.5(1)
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Version 10.3(1)SR2
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Version 11-0-1MSR1-1
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Version 10.4(1) 3rd Party
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Version 12.5(1)SR1
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Version 11.5(1)SR1
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Version 10.1(1)SR2
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Version 12.0(1)SR2
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Version 12.6(1)
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Version 10.3(1.11) 3rd Party
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Version 12.0(1)
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Version 12.0(1)SR1
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Version 9.3(3)
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Version 12.5(1)SR3
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Version 10.3(1)SR4b
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Version 9.3(4)SR1 3rd Party
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Version 10.3(1)SR5
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Version 10.1(1.9)
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Version 10.3(1.9) 3rd Party
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Version 9.3(4)SR2 3rd Party
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Version 10.3(1)SR1
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Version 10.3(1)SR3
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Version 10.1(1)SR1
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Version 12.0(1)SR3
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Version 12.6(1)SR1
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Version 12.7(1)
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Version 10.3(1)SR6
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Version 12.8(1)
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Version 12.7(1)SR1
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Version 11.0(2)SR1
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Version 11.0(4)
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Version 11.0(2)
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Version 11.0(4)SR3
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Version 11.0(5)
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Version 11.0(3)SR2
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Version 11.0(3)SR4
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Version 11.0(3)SR3
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Version 11.0(2)SR2
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Version 11.0(4)SR1
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Version 11.0(5)SR3
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Version 11.0(3)
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Version 11.0(5)SR2
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Version 11.0(3)SR6
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Version 11.0(5)SR1
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Version 11.0(4)SR2
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Version 11.0(3)SR1
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Version 11.0(3)SR5
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Version 11.0(6)
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Version 12.8(1)SR1
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Version 12.8(1)SR2
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Version 14.0(1)
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Version 14.0(1)SR1
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Version 11.0(6)SR1
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Version 10.3(1)SR7
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Version 14.0(1)SR2
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Version 14.1(1)
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Version 14.0(1)SR3
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Version 11.0(6)SR2
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Version 14.1(1)SR1
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Version 14.1(1)SR2
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Version 11.0(6)SR4
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Version 14.2(1)
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Version 14.2(1)SR1
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Version 11.0(6)SR5
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Version 14.1(1)SR3
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Version 14.2(1)SR2
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Version 3.1(1)
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Version 3.0(1)
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Version 2.3(1)
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Version 2.3(1)SR1
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Version 2.2(1)
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Version 2.1(1)
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Version 2.0(1)
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Version 14.2(1)SR3
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Version 3.1(1)SR1
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Version 14.3(1)
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Version 3.2(1)
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Version 14.3(1)SR1
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Version 14.2(1)SR4
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Version 3.3(1)
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Version 11.0(6)SR6
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Version 14.3(1)SR2
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Version 3.4(1)
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Version 14.3(1)SR3
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Version 3.5(1)
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Version 11.0(6)SR7
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Version 3.5(1)SR1
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Version 14.4(1)
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Version 3.6(1)
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Version 4.0(1)
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Version 14.4(1)SR1
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Version 4.1(1)
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Version 14.4(1)SR2
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Version 4.1(1)SR1
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.33% 0.258
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Cisco PSIRT 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-401 Missing Release of Memory after Effective Lifetime

The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

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04.09.2026 11:52
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03.09.2026 18:52
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-phone-dos-txMYNRzv