1.3

CVE-2026-0228: PAN-OS: Improper Validation of Terminal Server Agent Certificate

Deferred
Published 11-02-2026Last modified 11-02-2026

Vulnerability summary

CVE-2026-0228 is a low (CVSS 1.3) Improper Certificate Validation vulnerability in palo alto networks pan-os. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 9.9% of scored vulnerabilities.

Overall risk
5/100
0100
Minimal · default modelHow is this calculated?
CVSS score
1.3/10
010
Low · v4.0 (CVE.org)
EPSS score
0.21%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 11-02-2026
    PublishedVulnerability first disclosed.
  2. 11-02-2026
    Last modifiedVulnerability information updated.

Description

An improper certificate validation vulnerability in PAN-OS allows users to connect Terminal Server Agents on Windows to PAN-OS using expired certificates even if the PAN-OS configuration would not normally permit them to do so.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.19% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Palo alto networks2 products
  • pan-os≥ 11.2.0, < 11.2.8 | ≥ 11.1.0, < 11.1.11 | ≥ 10.2.0, < 10.2.17
  • prisma access≥ 10.2.0, < 10.2.10-h28

1 vendor · 2 products

References

1 links