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CVE-2025-20124

45
FAUCET Score

CVE-2025-20124 is a critical vulnerability in Cisco Identity Services Engine (ISE) that allows an authenticated, remote attacker with read-only administrative credentials to execute arbitrary commands as the root user. This is due to insecure deserialization of user-supplied Java byte streams. The vulnerability has a CVSS score of 7.2 (High) and a FAUCET Risk Score of 95/100, indicating a significant impact including potential for full compromise and privilege escalation. While not yet in the KEV catalog, an ExploitDB entry (EDB-52396) exists, and there is notable community discussion and media coverage, suggesting active interest in its exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.1CPE matchmatch criteria
cpe:2.3:a:cisco:identity_services_engine:*:*:*:*:*:*:*:*
3.1.0CPE matchmatch criteria
cpe:2.3:a:cisco:identity_services_engine:3.1.0:-:*:*:*:*:*:*
3.1.0CPE matchmatch criteria
cpe:2.3:a:cisco:identity_services_engine:3.1.0:patch1:*:*:*:*:*:*
3.1.0CPE matchmatch criteria
cpe:2.3:a:cisco:identity_services_engine:3.1.0:patch2:*:*:*:*:*:*
3.1.0CPE matchmatch criteria
cpe:2.3:a:cisco:identity_services_engine:3.1.0:patch3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.9CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.1
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
18.48%
Probability of exploitation in next 30 days
EPSS Percentile
96.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-52396 · Aug 11, 2025
This CVE's current EPSS score of 0.1848 is in the 95th percentile among its peer group of 5,531 CVEs.

Social Chatter

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

Media Mentions

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

sec.cloudapps.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-multivuls-FTW9AOXF
Vendor Advisory