How severe is CVE-2022-20740?

CVE-2022-20740 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2022-20740 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-20740?

CVE-2022-20740 affects Cisco Secure Firewall Management Center. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-20740?

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

When was CVE-2022-20740 published?

CVE-2022-20740 was published on 2022-05-03 and last updated on 2026-06-17.

CVE-2022-20740

CVE-2022-20740 is a medium-severity vulnerability in Cisco Secure Firewall Management Center with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Cisco Secure Firewall Management Center
Published: 2022-05-03
Last modified: 2026-06-17

Description

A vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an unauthenticated, remote attacker to conduct a cross-site scripting attack. This vulnerability is due to improper validation of user-supplied input to the web-based management interface. An attacker could exploit this vulnerability by convincing a user to click a link designed to pass malicious input to the interface. A successful exploit could allow the attacker to conduct cross-site scripting attacks and gain access to sensitive browser-based information.

Frequently asked questions

What is CVE-2022-20740?: A vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an unauthenticated, remote attacker to conduct a cross-site scripting attack. This vulnerability is due to improper validation of user-supplied input to the web-based management interface. An attacker could exploit this vulnerability by convincing a user to click a link designed to pass malicious input to the interface. A successful exploit could allow the attacker to conduct cross-site scripting attacks and gain access to sensitive browser-based information.
How severe is CVE-2022-20740?: CVE-2022-20740 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2022-20740 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-20740?: CVE-2022-20740 affects Cisco Secure Firewall Management Center. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-20740?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-20740 published?: CVE-2022-20740 was published on 2022-05-03 and last updated on 2026-06-17.

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-xss-SfpEcvGT

Affected products (1)

cpe:2.3:a:cisco:secure_firewall_management_center:*:*:*:*:*:*:*:*

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