CVE-2021-1577 json
Cisco Application Policy Infrastructure Controller Arbitrary File Read and Write Vulnerability
published 2021-08-25 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-7044
- cvss
- 9.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.3%
- EPSS 1.3% chance of exploitation in 30 days, percentile 70%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- cisco application_policy_infrastructure_controller 3.2\(10e\), 4.2\(6h\), 5.1\(3e\)
- cisco cloud_application_policy_infrastructure_controller 3.2\(10e\), 4.2\(6h\), 5.1\(3e\)
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 2 y ago
Exploit prediction
1.30% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| NVD | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| NVD | 2.0 | 6.4 | AV:N/AC:L/Au:N/C:P/I:P/A:N |
Affected products
- Cisco Cisco Application Policy Infrastructure Controller (APIC)
Classification
- Weakness
-
- CWE-284 Improper Access Control
References
Sources
- CVE List CVE-2021-1577
- NVD CVE-2021-1577
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