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CVE-2021-1578

29
FAUCET Score

CVE-2021-1578 is a high-severity privilege escalation vulnerability affecting Cisco Application Policy Infrastructure Controller (APIC) and Cloud APIC. An authenticated, remote attacker can exploit an improper policy default setting via a specific API request from Cisco ACI Multi-Site Orchestrator (MSO) to gain Administrator credentials. This vulnerability has a CVSS score of 8.8 (High), indicating a network-based attack with low complexity and high impact on confidentiality, integrity, and availability. There is currently no known active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.0, <= 5.1\(3e\)CPE matchmatch criteria
cpe:2.3:a:cisco:application_policy_infrastructure_controller:*:*:*:*:*:*:*:*
5.0\(2h\)CPE matchmatch criteria
cpe:2.3:a:cisco:application_policy_infrastructure_controller:5.0\(2h\):*:*:*:*:*:*:*
>= 5.0, <= 5.1\(3e\)CPE matchmatch criteria
cpe:2.3:a:cisco:cloud_application_policy_infrastructure_controller:*:*:*:*:*:*:*:*
5.0\(2h\)CPE matchmatch criteria
cpe:2.3:a:cisco:cloud_application_policy_infrastructure_controller:5.0\(2h\):*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.97%
Probability of exploitation in next 30 days
EPSS Percentile
78.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0197 is in the 77th percentile among its peer group of 17,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-capic-pesc-pkmGK4J
Vendor Advisory