CVE-2022-26531

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

5.67% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 92.3% of scored records. A rank, not a probability.

NVD base score

7.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2022-05-24 00:00Z4 YR AGO

Last updated

2024-08-03 05:03Z2 YR AGO

Reserved

2022-03-07

Assigning CNA

Zyxel

Record state

PUBLISHED

Severity

Medium (CVSS 6.1)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

Weaknesses

• CWE-20Improper Input ValidationClass

Data version

5.1

Document digest

bff02699803acbd9929956974f0b12efd56d817a5d3a2aead2344dc655b950da

• www.zyxel.comhttps://www.zyxel.com/support/multiple-vulnerabilities-of-firewalls-AP-controllers-and-APs.shtml
• seclists.org20220610 HNS-2022-02 - HN Security Advisory - Multiple vulnerabilities in Zyxel zyshhttp://seclists.org/fulldisclosure/2022/Jun/15mailing-list
• packetstormsecurity.comhttp://packetstormsecurity.com/files/167464/Zyxel-Buffer-Overflow-Format-String-Command-Injection.html
• packetstormsecurity.comhttp://packetstormsecurity.com/files/177036/Zyxel-zysh-Format-String-Proof-Of-Concept.html