How severe is CVE-2019-1757?

CVE-2019-1757 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2019-1757 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-1757?

CVE-2019-1757 primarily affects Cisco Ios. In total, 239 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-1757?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2019-1757 published?

CVE-2019-1757 was published on 2019-03-28 and last updated on 2026-06-17.

CVE-2019-1757

CVE-2019-1757 is a medium-severity vulnerability in Cisco Ios with a CVSS 3.x base score of 5.9. 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: Medium (CVSS 3.x base score 5.9)
CVSS v2: 4.3
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-295
Affected product: Cisco Ios
Published: 2019-03-28
Last modified: 2026-06-17

Description

A vulnerability in the Cisco Smart Call Home feature of Cisco IOS and IOS XE Software could allow an unauthenticated, remote attacker to gain unauthorized read access to sensitive data using an invalid certificate. The vulnerability is due to insufficient certificate validation by the affected software. An attacker could exploit this vulnerability by supplying a crafted certificate to an affected device. A successful exploit could allow the attacker to conduct man-in-the-middle attacks to decrypt confidential information on user connections to the affected software.

Frequently asked questions

What is CVE-2019-1757?: A vulnerability in the Cisco Smart Call Home feature of Cisco IOS and IOS XE Software could allow an unauthenticated, remote attacker to gain unauthorized read access to sensitive data using an invalid certificate. The vulnerability is due to insufficient certificate validation by the affected software. An attacker could exploit this vulnerability by supplying a crafted certificate to an affected device. A successful exploit could allow the attacker to conduct man-in-the-middle attacks to decrypt confidential information on user connections to the affected software.
How severe is CVE-2019-1757?: CVE-2019-1757 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2019-1757 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-1757?: CVE-2019-1757 primarily affects Cisco Ios. In total, 239 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-1757?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-1757 published?: CVE-2019-1757 was published on 2019-03-28 and last updated on 2026-06-17.

References

Affected products (239)

cpe:2.3:o:cisco:ios:2.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(6\)i1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.4\(25e\)jap1m:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.4\(25e\)jap2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.4\(25e\)jap26:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.4\(25e\)jaz1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.1\(2\)sg8a:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.1\(3\)svg3d:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.1\(3\)svi1b:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.1\(3\)svm3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.1\(3\)svn2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.1\(3\)svo1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.1\(3\)svo2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.1\(3\)svp1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.1\(4\)m12c:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)e4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)e5:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)e5a:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)e5b:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)e6:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)e7:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)e7b:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)e8:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(3\)e4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(3\)e5:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(3\)ea1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(4\)e2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(4\)e3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(4\)e4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(4\)e5:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(4\)e5a:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(4\)e6:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(4\)ea8:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(4\)ea9:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(4\)jaz1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(4\)jn1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(4a\)ea5:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(4m\)e2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(4m\)e3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(4n\)e2:*:*:*:*:*:*:*

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