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CVE-2021-1607

20
FAUCET Score

CVE-2021-1607 describes multiple stored cross-site scripting (XSS) vulnerabilities in the web-based management interface of Cisco Identity Services Engine (ISE). These flaws stem from insufficient validation of user-supplied input, allowing an authenticated, remote attacker to inject malicious code. The vulnerability has a CVSS score of 4.8 (Medium), indicating a moderate severity. Exploitation requires valid administrative credentials and user interaction, but a successful attack could lead to arbitrary script execution in the context of the interface or access to sensitive browser-based information. Currently, there is no evidence of active exploitation, and no public exploit code is available on platforms like Metasploit or ExploitDB. Community discussion and media coverage for this CVE are also minimal.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.6.0CPE matchmatch criteria
cpe:2.3:a:cisco:identity_services_engine:*:*:*:*:*:*:*:*
2.6\(0.999\)CPE matchmatch criteria
cpe:2.3:a:cisco:identity_services_engine:2.6\(0.999\):-:*:*:*:*:*:*
2.6.0CPE matchmatch criteria
cpe:2.3:a:cisco:identity_services_engine:2.6.0:-:*:*:*:*:*:*
2.6.0CPE matchmatch criteria
cpe:2.3:a:cisco:identity_services_engine:2.6.0:patch1:*:*:*:*:*:*
2.6.0CPE matchmatch criteria
cpe:2.3:a:cisco:identity_services_engine:2.6.0:patch2:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.8MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
1.7
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.59%
Probability of exploitation in next 30 days
EPSS Percentile
44.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0059 is in the 75th percentile among its peer group of 4,937 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 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-ise-stored-xss-TWwjVPdL
Vendor Advisory