How severe is CVE-2020-27123?

CVE-2020-27123 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-27123 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-27123?

CVE-2020-27123 affects Cisco Anyconnect Secure Mobility Client. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-27123?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-27123 published?

CVE-2020-27123 was published on 2020-11-06 and last updated on 2026-06-17.

CVE-2020-27123

CVE-2020-27123 is a medium-severity vulnerability in Cisco Anyconnect Secure Mobility Client with a CVSS 3.x base score of 5.5. 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-749.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.9
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-749
Affected product: Cisco Anyconnect Secure Mobility Client
Published: 2020-11-06
Last modified: 2026-06-17

Description

A vulnerability in the interprocess communication (IPC) channel of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to read arbitrary files on the underlying operating system of an affected device. The vulnerability is due to an exposed IPC function. An attacker could exploit this vulnerability by sending a crafted IPC message to the AnyConnect process on an affected device. A successful exploit could allow the attacker to read arbitrary files on the underlying operating system of the affected device.

Frequently asked questions

What is CVE-2020-27123?: A vulnerability in the interprocess communication (IPC) channel of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to read arbitrary files on the underlying operating system of an affected device. The vulnerability is due to an exposed IPC function. An attacker could exploit this vulnerability by sending a crafted IPC message to the AnyConnect process on an affected device. A successful exploit could allow the attacker to read arbitrary files on the underlying operating system of the affected device.
How severe is CVE-2020-27123?: CVE-2020-27123 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-27123 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-27123?: CVE-2020-27123 affects Cisco Anyconnect Secure Mobility Client. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-27123?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-27123 published?: CVE-2020-27123 was published on 2020-11-06 and last updated on 2026-06-17.

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-anyconnect-file-read-LsvDD6Uh

Affected products (1)

cpe:2.3:a:cisco:anyconnect_secure_mobility_client:*:*:*:*:*:windows:*:*

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