CVE-2026-0234
CVE-2026-0234 is a critical-severity vulnerability in Paloaltonetworks Cortex Xsiam with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-347.
Key facts
- Severity: Critical (CVSS 3.x base score 9.1)
- CVSS v4: 7.2
- EPSS exploit prediction: 0% (14th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-21899
- Weakness: CWE-347
- Affected product: Paloaltonetworks Cortex Xsiam
- Published:
- Last modified:
Description
An improper verification of cryptographic signature vulnerability exists in Cortex XSOAR and Cortex XSIAM platforms during integration of Microsoft Teams that enables an unauthenticated user to access and modify protected resources.
Frequently asked questions
- What is CVE-2026-0234?
- An improper verification of cryptographic signature vulnerability exists in Cortex XSOAR and Cortex XSIAM platforms during integration of Microsoft Teams that enables an unauthenticated user to access and modify protected resources.
- How severe is CVE-2026-0234?
- CVE-2026-0234 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
- Is CVE-2026-0234 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-0234?
- CVE-2026-0234 primarily affects Paloaltonetworks Cortex Xsiam. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2026-0234?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2026-0234 have an EU (EUVD) identifier?
- Yes. CVE-2026-0234 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21899.
- When was CVE-2026-0234 published?
- CVE-2026-0234 was published on 2026-04-13 and last updated on 2026-07-07.
References
Affected products (2)
- cpe:2.3:a:paloaltonetworks:cortex_xsiam:*:*:*:*:*:*:*:*
- cpe:2.3:a:paloaltonetworks:cortex_xsoar:*:*:*:*:*:*:*:*
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