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CVE-2021-1577

CRITICALCVSS 9.1/10EPSS 1.30%

Last modified

CVE-2021-1577 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. A vulnerability in an API endpoint of Cisco Application Policy Infrastructure Controller (APIC) and Cisco Cloud Application Policy Infrastructure Controller (Cloud APIC) could allow an unauthenticated, remote attacker to read or write arbitrary files on an affected system. This vulnerability is due to improper access control. EPSS estimates a 1.30% chance of exploitation in the next 30 days.

Description

A vulnerability in an API endpoint of Cisco Application Policy Infrastructure Controller (APIC) and Cisco Cloud Application Policy Infrastructure Controller (Cloud APIC) could allow an unauthenticated, remote attacker to read or write arbitrary files on an affected system. This vulnerability is due to improper access control. An attacker could exploit this vulnerability by using a specific API endpoint to upload a file to an affected device. A successful exploit could allow the attacker to read or write arbitrary files on an affected device.

Metrics

CVSS 3.1
9.1/10

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

EPSS Probability
1.30%

66.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoApplication Policy Infrastructure Controller< 3.2\(10e\)
CiscoApplication Policy Infrastructure Controller>= 4.0, < 4.2\(6h\)
CiscoApplication Policy Infrastructure Controller>= 5.0, < 5.1\(3e\)
CiscoCloud Application Policy Infrastructure Controller< 3.2\(10e\)
CiscoCloud Application Policy Infrastructure Controller>= 4.0, < 4.2\(6h\)
CiscoCloud Application Policy Infrastructure Controller>= 5.0, < 5.1\(3e\)

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-1577?
A vulnerability in an API endpoint of Cisco Application Policy Infrastructure Controller (APIC) and Cisco Cloud Application Policy Infrastructure Controller (Cloud APIC) could allow an unauthenticated, remote attacker to read or write arbitrary files on an affected system. This vulnerability is due to improper access control. An attacker could exploit this vulnerability by using a specific API endpoint to upload a file to an affected device. A successful exploit could allow the attacker to read or write arbitrary files on an affected device.
How severe is CVE-2021-1577?
CVE-2021-1577 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 1.30% probability of exploitation in the next 30 days.
How do I fix CVE-2021-1577?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-1577?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST