How severe is CVE-2019-1743?

CVE-2019-1743 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-1743 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-1743?

CVE-2019-1743 primarily affects Cisco Ios Xe. In total, 31 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-1743?

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-2019-1743 published?

CVE-2019-1743 was published on 2019-03-28 and last updated on 2026-06-17.

CVE-2019-1743

CVE-2019-1743 is a high-severity vulnerability in Cisco Ios Xe with a CVSS 3.x base score of 8.8. 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-20.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Ios Xe
Published: 2019-03-28
Last modified: 2026-06-17

Description

A vulnerability in the web UI framework of Cisco IOS XE Software could allow an authenticated, remote attacker to make unauthorized changes to the filesystem of the affected device. The vulnerability is due to improper input validation. An attacker could exploit this vulnerability by crafting a malicious file and uploading it to the device. An exploit could allow the attacker to gain elevated privileges on the affected device.

Frequently asked questions

What is CVE-2019-1743?: A vulnerability in the web UI framework of Cisco IOS XE Software could allow an authenticated, remote attacker to make unauthorized changes to the filesystem of the affected device. The vulnerability is due to improper input validation. An attacker could exploit this vulnerability by crafting a malicious file and uploading it to the device. An exploit could allow the attacker to gain elevated privileges on the affected device.
How severe is CVE-2019-1743?: CVE-2019-1743 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-1743 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-1743?: CVE-2019-1743 primarily affects Cisco Ios Xe. In total, 31 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-1743?: 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-2019-1743 published?: CVE-2019-1743 was published on 2019-03-28 and last updated on 2026-06-17.

References

Affected products (31)

cpe:2.3:o:cisco:ios_xe:16.2.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.2.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.3.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.3.1a:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.3.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.3.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.3.4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.3.5:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.3.5b:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.3.6:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.4.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.4.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.4.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.5.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.5.1a:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.5.1b:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.5.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.5.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.6.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.6.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.6.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.7.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.7.1a:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.7.1b:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.8.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.8.1a:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.8.1b:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.8.1c:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.8.1d:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.8.1e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.8.1s:*:*:*:*:*:*:*

More vulnerabilities in Cisco Ios Xe

CVE-2025-20188 — Critical (CVSS 10.0): A vulnerability in the Out-of-Band Access Point (AP) Image Download, the Clean Air Spectral Recording, and the client…
CVE-2023-20198 — Critical (CVSS 10.0): Cisco is providing an update for the ongoing investigation into observed exploitation of the web UI feature in Cisco…
CVE-2021-34770 — Critical (CVSS 10.0): A vulnerability in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing of Cisco IOS XE…
CVE-2019-12643 — Critical (CVSS 10.0): A vulnerability in the Cisco REST API virtual service container for Cisco IOS XE Software could allow an…
CVE-2021-1619 — Critical (CVSS 9.8): A vulnerability in the authentication, authorization, and accounting (AAA) function of Cisco IOS XE Software could…
CVE-2020-3227 — Critical (CVSS 9.8): A vulnerability in the authorization controls for the Cisco IOx application hosting infrastructure in Cisco IOS XE…

All CVEs affecting Cisco Ios Xe →

Other CWE-20 (Improper Input Validation) vulnerabilities

CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →