What’s Vulnerable › Vulnerabilities

CVE-2021-34998

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-01-13 · updated 2026-06-17
• Weakness: CWE-250

Description

This vulnerability allows local attackers to escalate privileges on affected installations of Panda Security Free Antivirus 20.2.0.0. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the use of named pipes. The issue results from allowing an untrusted process to impersonate the client of a pipe. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-14208.

Affected products

• Panda Security Free Antivirus: before 20.02.00 — fixed in 20.02.00

How to fix

Upgrade to a fixed version: Panda Security Free Antivirus 20.02.00. Check the vendor advisory for mitigations.

References

• https://www.pandasecurity.com/en/support/card?id=100077
• https://www.zerodayinitiative.com/advisories/ZDI-21-1336/
• https://www.pandasecurity.com/en/support/card?id=100077
• https://www.zerodayinitiative.com/advisories/ZDI-21-1336/

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