CVE-2021-40123

CVE-2021-40123 is a medium-severity vulnerability in Cisco Identity Services Engine with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-276.

Key facts

Description

A vulnerability in the web-based management interface of Cisco Identity Services Engine (ISE) could allow an authenticated, remote attacker with administrative read-only privileges to download files that should be restricted. This vulnerability is due to incorrect permissions settings on an affected device. An attacker could exploit this vulnerability by sending a crafted HTTP request to the device. A successful exploit could allow the attacker to download files that should be restricted.

Frequently asked questions

What is CVE-2021-40123?
A vulnerability in the web-based management interface of Cisco Identity Services Engine (ISE) could allow an authenticated, remote attacker with administrative read-only privileges to download files that should be restricted. This vulnerability is due to incorrect permissions settings on an affected device. An attacker could exploit this vulnerability by sending a crafted HTTP request to the device. A successful exploit could allow the attacker to download files that should be restricted.
How severe is CVE-2021-40123?
CVE-2021-40123 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-40123 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40123?
CVE-2021-40123 primarily affects Cisco Identity Services Engine. In total, 25 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-40123?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-40123 published?
CVE-2021-40123 was published on 2021-10-21 and last updated on 2026-06-17.

References

Affected products (25)

More vulnerabilities in Cisco Identity Services Engine

All CVEs affecting Cisco Identity Services Engine →

Other CWE-276 (Incorrect Default Permissions) vulnerabilities

Browse all CWE-276 (Incorrect Default Permissions) vulnerabilities →