CVE-2019-1683· NVD / CVE Program· CNA cisco

Cisco SPA112, SPA525, and SPA5x5 Series IP Phones Certificate Validation Vulnerability

Noroxi assessment

Priority: Monitor (action score 29/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.87% (FIRST EPSS); higher than 58.6% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
According to the record, no fixed version is available yet.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

HighCVSS 7.4 · v3.1—No exploit No fix recorded

BDU:2019-00942

Published: Feb 25, 2019
Updated: Jun 16, 2026
EPSS: 0.8% · 58th percentile
CWE: CWE-295

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 29 / 40 · 7.4 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.8%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: 7.4
CNA · cisco: 6.5; 0.9 point gap

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
cisco	spa112 firmware	cpe:2.3:o:cisco:spa112_firmware
cisco	spa112	cpe:2.3:h:cisco:spa112
cisco	spa525 firmware	cpe:2.3:o:cisco:spa525_firmware
cisco	spa525	cpe:2.3:h:cisco:spa525
cisco	spa5x5 firmware	cpe:2.3:o:cisco:spa5x5_firmware
cisco	spa5x5	cpe:2.3:h:cisco:spa5x5
cisco	spa500 firmware	cpe:2.3:o:cisco:spa500_firmware
cisco	spa500	cpe:2.3:o:cisco:spa500
cisco	spa500s firmware	cpe:2.3:o:cisco:spa500s_firmware
cisco	spa500s	cpe:2.3:h:cisco:spa500s
cisco	spa500ds firmware	cpe:2.3:o:cisco:spa500ds_firmware
cisco	spa500ds	cpe:2.3:h:cisco:spa500ds

and 16 more

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This vulnerability is about certificate validation or weak cryptography. The free SSL checker tests your certificate, enabled TLS versions and weak ciphers.

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Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

cisco spa112 firmware1.4.2
cisco spa500 firmware1.4.2
cisco spa500ds firmware1.4.2
cisco spa500s firmware1.4.2
cisco spa501g firmware1.4.2
cisco spa502g firmware1.4.2
cisco spa504g firmware1.4.2
cisco spa508g firmware1.4.2
cisco spa509g firmware1.4.2
cisco spa512g firmware1.4.2
cisco spa514g firmware1.4.2
cisco spa525 firmware7.6.2
cisco spa525g firmware1.4.2
cisco spa5x5 firmware7.6.2

Versions reported by the vendor

Affected version ranges reported by the assigning authority (cisco). Independent of NVD's CPE analysis and usually ahead of it.

Cisco Cisco Small Business SPA112 Series IP Phones
- 1.4.2affected
Cisco Cisco Small Business SPA500 Series IP Phones
- 1.4.2affected
Cisco Cisco Small Business SPA525 Series IP Phones
- 7.6.2affected
Cisco Cisco Small Business SPA5X5 Series IP Phones
- 7.6.2affected

Same product

cisco: all records

Other highest-scoring records for the same primary product.

CVE-2023-20126Cisco SPA112 2-Port Phone Adapters Remote Command Execution Vulnerability
50Plan
CVE-2019-15252Cisco SPA100 Series Analog Telephone Adapters Remote Code Execution Vulnerabilities
32Monitor
CVE-2019-15251Cisco SPA100 Series Analog Telephone Adapters Remote Code Execution Vulnerabilities
32Monitor

Published before and after this one in the same product

Later →CVE-2019-12702Oct 16, 2019 · Cisco SPA100 Series Analog Telephone Adapters Reflected Cross-Site Scripting Vulnerability
21Monitor
Later →CVE-2019-12704Oct 16, 2019 · Cisco SPA100 Series Analog Telephone Adapters Web-Based Management Interface File Disclosure Vulnerability
26Monitor
Later →CVE-2019-12708Oct 16, 2019 · Cisco SPA100 Series Analog Telephone Adapters Administrative Credentials Information Disclosure Vulnerability
26Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-19-015 · Feb 20, 2019(Cisco Güvenlik Güncellemeleri Yayınladı)

All national notices →

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
Special conditions such as timing or configuration are required.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: none

Attack vector: Network
Attack complexity: High
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: None

Weakness class (CWE)

CWE-295 · Improper Certificate Validation

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

nvd-primary

Root cause

A certificate validation error is silently swallowed instead of terminating the connection. Often, code added for a test environment makes its way into production.

The bug in code

The whole CWE-295 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

kotlin

1override fun checkServerTrusted(chain: Array<X509Certificate>, type: String) {
2  // Left empty for the test environment
3}

Fixed

kotlin

1val client = OkHttpClient.Builder()
2  .certificatePinner(
3    CertificatePinner.Builder()
4      .add("api.sirius.example", "sha256/…")
5      .build()
6  ).build()

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

—

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

www.securityfocus.com/bid/107111

Show all references (1 more)

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190220-ipphone-certs

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records