Cortex XSOAR Microsoft Teams Marketplace: Improper Verification of Cryptographic Signature
CVE-2026-0234 is a critical-severity improper verification of cryptographic signature vulnerability in Cortex XSOAR Microsoft Teams Marketplace from Palo Alto Networks, with a CVSS 3.1 base score of 9.1 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version 1.5.52 as the first without the flaw, so updating Cortex XSOAR Microsoft Teams Marketplace to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.24% chance of exploitation within 30 days, which is low compared with other CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update Cortex XSOAR Microsoft Teams Marketplace to 1.5.52 or a later version.
- Update Cortex XSIAM Microsoft Teams Marketplace to 1.5.52 or a later version.
- Update Cortex Xsiam to 1.5.52 or a later version.
- Read the advisory on security.paloaltonetworks.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Palo Alto Networks | Cortex XSOAR Microsoft Teams Marketplace | 1.5.0 up to, but not including, 1.5.52 | 1.5.52 |
| Palo Alto Networks | Cortex XSIAM Microsoft Teams Marketplace | 1.5.0 up to, but not including, 1.5.52 | 1.5.52 |
| Palo Alto Networks | Cortex Xsiam | 1.5.0 up to, but not including, 1.5.52 | 1.5.52 |
| Palo Alto Networks | Cortex Xsoar | 1.5.0 up to, but not including, 1.5.52 | 1.5.52 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 7.2 | High | CNA (paloaltonetworks.com) |
| CVSS 3.1 | 9.1 | Critical | NVD |
Official 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.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Verification of Cryptographic Signature
The product does not verify, or incorrectly verifies, the cryptographic signature for data.
More Improper Verification of Cryptographic Signature vulnerabilities (CWE-347)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Recent Improper Verification of Cryptographic Signature vulnerabilities
- 8.1 High severity
- 8.1 High severity
- 8.1 High severity
- 9.1 Critical severity
- 7.5 High severity
- 8.1 High severity
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