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CVE-2013-5531

15
FAUCET Score

CVE-2013-5531 describes an authentication bypass vulnerability in Cisco Identity Services Engine (ISE) 1.x before version 1.1.1. This flaw allows remote attackers to read sensitive support-bundle configuration and credentials data by crafting a specific session on TCP port 443. With a CVSS score of 5.0, this vulnerability is of medium severity, requiring no authentication and low attack complexity to achieve partial confidentiality impact. While no public exploit code or active exploitation has been observed, and community discussion is minimal, organizations using affected ISE versions should upgrade to mitigate this risk.

Impacted Technologies

VendorProductVersion(s)CPE
1.0CPE matchmatch criteria
cpe:2.3:a:cisco:identity_services_engine_software:1.0:*:*:*:*:*:*:*
1.1CPE matchmatch criteria
cpe:2.3:a:cisco:identity_services_engine_software:1.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:P/I:N/A:N

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.34%
Probability of exploitation in next 30 days
EPSS Percentile
68.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0134 is in the 49th percentile among its peer group of 23,725 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 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-20131023-ise
Vendor Advisory