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CVE-2020-2021: Palo Alto Networks PAN-OS Authentication Bypass Vulnerability

criticalknown exploitedCVE-2020-2021
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Palo Alto Networks PAN-OS contains a vulnerability in SAML which allows an attacker to bypass authentication.

CSIRTS triage

vendor: Palo Alto Networksproduct: PAN-OSAuthentication bypassOther
What
A vulnerability in SAML allows attackers to bypass authentication mechanisms.
Who is affected
Users of Palo Alto Networks PAN-OS are affected by this vulnerability.
Urgency
Remediation is urgent as this is a critical vulnerability with active exploitation reported.
Action
Update PAN-OS to the latest version to address this vulnerability.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2022-03-25
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2020-2021

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2020-2021coverage & exploitation statusNVD · CVE.org

Recent advisories for Palo Alto Networks

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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