9

CVE-2021-1359: cisco asyncos Missing XML Validation

CVSS: 9.0v2.0HighModified
Published 08-07-2021Last modified 07-11-2024
Open JSON

Vulnerability summary

CVE-2021-1359 is a high (CVSS 9.0) Missing XML Validation vulnerability in cisco asyncos. EPSS estimates a 1.88% chance of exploitation in the next 30 days, higher than 79.1% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.0/10
010
High · v2.0 (NVD)
EPSS score
1.88%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 08-07-2021
    PublishedVulnerability first disclosed.
  2. 07-11-2024
    Last modifiedVulnerability information updated.

Description

A vulnerability in the configuration management of Cisco AsyncOS for Cisco Web Security Appliance (WSA) could allow an authenticated, remote attacker to perform command injection and elevate privileges to root. This vulnerability is due to insufficient validation of user-supplied XML input for the web interface. An attacker could exploit this vulnerability by uploading crafted XML configuration files that contain scripting code to a vulnerable device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system and elevate privileges to root. An attacker would need a valid user account with the rights to upload configuration files to exploit this vulnerability.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.88%

Chance of exploitation in the next 30 days

Percentile

79%

Versus all other CVEs

30-day change

0.00 pp

From 1.88% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.88%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Cisco3 products

1 vendor · 3 products

References

1 links