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CVE-2021-1397

20
FAUCET Score

CVE-2021-1397 is an open redirect vulnerability in the web-based management interface of Cisco Integrated Management Controller (IMC) Software. This flaw, caused by improper input validation, allows an unauthenticated, remote attacker to redirect users to malicious web pages. With a CVSS score of 6.1 (Medium), exploitation requires user interaction via a crafted link, potentially leading to phishing attacks. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.2\(12.4\)CPE matchmatch criteria
cpe:2.3:a:cisco:integrated_management_controller:*:*:*:*:*:*:*:*
<= 4.1\(3b\)CPE matchmatch criteria
cpe:2.3:a:cisco:ucs_manager:*:*:*:*:*:*:*:*
<= 4.4.2CPE matchmatch criteria
cpe:2.3:o:cisco:encs_5100_firmware:*:*:*:*:*:*:*:*
<= 4.4.2CPE matchmatch criteria
cpe:2.3:o:cisco:encs_5400_firmware:*:*:*:*:*:*:*:*
<= 4.1\(2f\)CPE matchmatch criteria
cpe:2.3:o:cisco:c220_m6_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.7MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.83%
Probability of exploitation in next 30 days
EPSS Percentile
53.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0083 is in the 63rd percentile among its peer group of 26,219 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 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 0.1 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-imc-openred-zAYrU6d2
Vendor Advisory