How severe is CVE-2019-1683?

CVE-2019-1683 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2019-1683 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-1683?

CVE-2019-1683 primarily affects Cisco Spa112 Firmware. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-1683?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-1683 published?

CVE-2019-1683 was published on 2019-02-25 and last updated on 2026-06-17.

CVE-2019-1683

CVE-2019-1683 is a high-severity vulnerability in Cisco Spa112 Firmware with a CVSS 3.x base score of 7.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-295.

Key facts

Severity: High (CVSS 3.x base score 7.4)
CVSS v2: 5.8
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-295
Affected product: Cisco Spa112 Firmware
Published: 2019-02-25
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2019-1683?: 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.
How severe is CVE-2019-1683?: CVE-2019-1683 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2019-1683 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-1683?: CVE-2019-1683 primarily affects Cisco Spa112 Firmware. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-1683?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-1683 published?: CVE-2019-1683 was published on 2019-02-25 and last updated on 2026-06-17.

References

Affected products (14)

cpe:2.3:o:cisco:spa112_firmware:1.4.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:spa525_firmware:7.6.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:spa5x5_firmware:7.6.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:spa500_firmware:1.4.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:spa500s_firmware:1.4.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:spa500ds_firmware:1.4.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:spa501g_firmware:1.4.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:spa502g_firmware:1.4.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:spa504g_firmware:1.4.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:spa508g_firmware:1.4.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:spa509g_firmware:1.4.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:spa512g_firmware:1.4.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:spa514g_firmware:1.4.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:spa525g_firmware:1.4.2:*:*:*:*:*:*:*

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