CVE-2019-1683

mediumpriority · track · 30EPSS 0.009 · 59 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.87% (59th) EPSS

CVSS 5.8 · medium

Is it mine?

23 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cisco_csaf

EPSS · scored 2026-10-27

A vulnerability in the certificate handling component of the Cisco SPA112, SPA525, and SPA5X5 Series IP Phones could allow an unauthenticated, remote attacker to listen to or control some aspects of a Transport Level Security (TLS)-encrypted Session Initiation Protocol (SIP) conversation. The vulnerability is due to the improper validation of server certificates. An attacker could exploit this vulnerability by crafting a malicious server certificate to present to the client. An exploit could allow an attacker to eavesdrop on TLS-encrypted traffic and potentially route or redirect calls initiated by an affected device. Affected software include version 7.6.2 of the Cisco Small Business SPA525 Series IP Phones and Cisco Small Business SPA5X5 Series IP Phones and version 1.4.2 of the Cisco Small Business SPA500 Series IP Phones and Cisco Small Business SPA112 Series IP Phones.

remediations

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

A vendor fix is available.

FixedCisco Small Business SPA500 Series IP Phonescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco Small Business Voice Gateways and ATAs cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com

cvss

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

7.4

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.8–7.4

v2.05.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 4.9

v3.17.4highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Nprimary · NVD / NIST USexploitability 2.2 · impact 5.2

v3.06.5mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:Nsecondary · ENISA EU

v3.06.5mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:Nsecondary · psirt@cisco.com USexploitability 2.2 · impact 4.2

v3.06.5mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:Nsecondary · Cisco PSIRT US

v3.16.5mediumAV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:Nsecondary · FSTEC (BDU) RU

v3.16.8mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

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

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-295USprimaryCWE-295US

affected products (23)

Products and version ranges known to be affected.

Cisco Cisco Small Business SPA500 Series IP Phonesall versionscisco_csafUS
Cisco Cisco Small Business Voice Gateways and ATAs all versionscisco_csafUS
Cisco Cisco Small Business SPA112 Series IP Phones≤ 1.4.2enisa_euvdEU
Cisco Cisco Small Business SPA500 Series IP Phones≤ 1.4.2enisa_euvdEU
Cisco Cisco Small Business SPA525 Series IP Phones≤ 7.6.2enisa_euvdEU
Cisco Cisco Small Business SPA5X5 Series IP Phones≤ 7.6.2enisa_euvdEU
Cisco Systems Inc. Cisco Small Business IP Phones≤ 7.6.2fstec_bduRU
Cisco Systems Inc. Cisco Small Business SPA500 Series IP Phones≤ 7.6.2fstec_bduRU
Cisco Systems Inc. Cisco Small Business Voice Gateways and ATAs≤ 1.4.2fstec_bduRU
cisco spa112 firmware= 1.4.2nvdUScpe:2.3:o:cisco:spa112_firmware:*:*:*:*:*:*:*:*
cisco spa500 firmware= 1.4.2nvdUScpe:2.3:o:cisco:spa500_firmware:*:*:*:*:*:*:*:*
cisco spa500ds firmware= 1.4.2nvdUScpe:2.3:o:cisco:spa500ds_firmware:*:*:*:*:*:*:*:*
cisco spa500s firmware= 1.4.2nvdUScpe:2.3:o:cisco:spa500s_firmware:*:*:*:*:*:*:*:*
cisco spa501g firmware= 1.4.2nvdUScpe:2.3:o:cisco:spa501g_firmware:*:*:*:*:*:*:*:*
cisco spa502g firmware= 1.4.2nvdUScpe:2.3:o:cisco:spa502g_firmware:*:*:*:*:*:*:*:*
cisco spa504g firmware= 1.4.2nvdUScpe:2.3:o:cisco:spa504g_firmware:*:*:*:*:*:*:*:*
cisco spa508g firmware= 1.4.2nvdUScpe:2.3:o:cisco:spa508g_firmware:*:*:*:*:*:*:*:*
cisco spa509g firmware= 1.4.2nvdUScpe:2.3:o:cisco:spa509g_firmware:*:*:*:*:*:*:*:*
cisco spa512g firmware= 1.4.2nvdUScpe:2.3:o:cisco:spa512g_firmware:*:*:*:*:*:*:*:*
cisco spa514g firmware= 1.4.2nvdUScpe:2.3:o:cisco:spa514g_firmware:*:*:*:*:*:*:*:*

showing 20 of 23

advisories (1)

Vendor and ecosystem advisories describing this.

cisco-sa-20190220-ipphone-certsCisco SPA112, SPA525, and SPA5x5 Series IP Phones Certificate Validation Vulnerability2019-02-20csaf · cisco_csafUS
A vulnerability in the certificate handling component of the Cisco SPA112, SPA525, and SPA5X5 Series IP Phones could allow an unauthenticated, remote attacker to listen to or control some aspects of a Transport Level Security (TLS)-encrypted Session Initiation Protocol (SIP) conversation. The vulnerability is due to the improper validation of server certificates. An attacker could exploit this vulnerability by crafting a malicious server certificate to present to the client. An exploit could allow an attacker to eavesdrop on TLS-encrypted traffic and potentially route or redirect calls initiated by an affected device. 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-20190220-ipphone-certs ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190220-ipphone-certs"]

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 2019-02-25modified 2026-06-17

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+1889 more

references (11)

External citations — patches, advisories, analysis.

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