CVE-2019-1922

highpriority · track · 30EPSS 0.013 · 71 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.32% (71st) EPSS

CVSS 7.8 · high

Is it mine?

26 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cisco_csaf

EPSS · scored 2026-10-27

A vulnerability in Cisco SIP IP Phone Software for Cisco IP Phone 7800 Series and 8800 Series could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected phone. The vulnerability is due to insufficient validation of input Session Initiation Protocol (SIP) packets. An attacker could exploit this vulnerability by altering the SIP replies that are sent to the affected phone during the registration process. A successful exploit could allow the attacker to cause the phone to reboot and not complete the registration process.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedCisco IP Phone 7800 Series cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IP Phone 8800 Series Softwarecisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.3–7.8

v2.07.8highAV:N/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 10 · impact 6.9

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.05.3mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.05.3mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:Hsecondary · Cisco PSIRT US

v3.05.3mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:Hsecondary · psirt@cisco.com USexploitability 1.6 · impact 3.6

v3.06.9mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.15.3mediumAV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-476USprimaryCWE-476US

affected products (26)

Products and version ranges known to be affected.

Cisco Cisco IP Phone 7800 Series all versionscisco_csafUS
Cisco Cisco IP Phone 8800 Series Softwareall versionscisco_csafUS
Cisco Cisco IP Phone 8800 Series Softwareunspecified → 12.0(1)MN130enisa_euvdEU
Cisco Systems Inc. Cisco IP Phone 7800 Series≤ 11.5(1)fstec_bduRU
Cisco Systems Inc. Cisco IP Phone 7800 Series≤ 12.5(1)fstec_bduRU
Cisco Systems Inc. IP Phone 8800 Series≤ 12.5(1)fstec_bduRU
Cisco Systems Inc. IP Phone 8800 Series≤ 11.5(1)fstec_bduRU
cisco ip conference phone 7832 firmwareall versionsnvdUScpe:2.3:o:cisco:ip_conference_phone_7832_firmware:*:*:*:*:*:*:*:*
cisco ip conference phone 8832 firmware= 11.5(1)nvdUScpe:2.3:o:cisco:ip_conference_phone_8832_firmware:*:*:*:*:*:*:*:*
cisco ip conference phone 8832 firmware= 12.5(1)nvdUScpe:2.3:o:cisco:ip_conference_phone_8832_firmware:*:*:*:*:*:*:*:*
cisco ip phone 7811 firmwareall versionsnvdUScpe:2.3:o:cisco:ip_phone_7811_firmware:*:*:*:*:*:*:*:*
cisco ip phone 7821 firmwareall versionsnvdUScpe:2.3:o:cisco:ip_phone_7821_firmware:*:*:*:*:*:*:*:*
cisco ip phone 7841 firmwareall versionsnvdUScpe:2.3:o:cisco:ip_phone_7841_firmware:*:*:*:*:*:*:*:*
cisco ip phone 7861 firmwareall versionsnvdUScpe:2.3:o:cisco:ip_phone_7861_firmware:*:*:*:*:*:*:*:*
cisco ip phone 8811 firmware= 11.5(1)nvdUScpe:2.3:o:cisco:ip_phone_8811_firmware:*:*:*:*:*:*:*:*
cisco ip phone 8811 firmware= 12.5(1)nvdUScpe:2.3:o:cisco:ip_phone_8811_firmware:*:*:*:*:*:*:*:*
cisco ip phone 8841 firmware= 11.5(1)nvdUScpe:2.3:o:cisco:ip_phone_8841_firmware:*:*:*:*:*:*:*:*
cisco ip phone 8841 firmware= 12.5(1)nvdUScpe:2.3:o:cisco:ip_phone_8841_firmware:*:*:*:*:*:*:*:*
cisco ip phone 8845 firmware= 11.5(1)nvdUScpe:2.3:o:cisco:ip_phone_8845_firmware:*:*:*:*:*:*:*:*
cisco ip phone 8845 firmware= 12.5(1)nvdUScpe:2.3:o:cisco:ip_phone_8845_firmware:*:*:*:*:*:*:*:*

showing 20 of 26

advisories (1)

Vendor and ecosystem advisories describing this.

cisco-sa-20190703-ip-phone-sip-dosCisco IP Phone 7800 and 8800 Series Session Initiation Protocol Denial of Service Vulnerability2019-07-03csaf · cisco_csafUS
A vulnerability in Cisco SIP IP Phone Software for Cisco IP Phone 7800 Series and 8800 Series could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected phone. The vulnerability is due to insufficient validation of input Session Initiation Protocol (SIP) packets. An attacker could exploit this vulnerability by altering the SIP replies that are sent to the affected phone during the registration process. A successful exploit could allow the attacker to cause the phone to reboot and not complete the registration process. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-ip-phone-sip-dos ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-ip-phone-sip-dos"]

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cisco_csaf nvd NVD CVE.org MITRE

published 2019-07-06modified 2026-06-17

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references (9)

External citations — patches, advisories, analysis.

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