CVE-2025-49088: Pexip Infinity · Reachable Assertion
Affects Pexip InfinitySource CVE Database V5
Not known to be exploited · CVSS 5.9 Medium.
Data as of 25 Oct 2026, 19:02 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 24% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 25 Dec 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Pexip Infinity | Affected
| Fixed in– |
AI-suggested
To mitigate CVE-2025-49088, European organizations should: 1) Upgrade Pexip Infinity to version 37.2 or later as soon as the patch is available, as this version addresses the vulnerability. 2) Review and restrict configurations of the OTJ service for Teams SIP Guest Join to minimize exposure, disabling OTJ if not required. 3) Implement input validation and filtering at the network perimeter or application layer to detect and block malformed calendar invites that could trigger the assertion. 4) Monitor logs and alerts for abnormal OTJ service crashes or calendar invite anomalies to detect potential exploitation attempts. 5) Coordinate with Microsoft Teams administrators to ensure that calendar invite sources are trusted and authenticated where possible. 6) Conduct internal testing of calendar invite handling to identify any other potential input validation weaknesses. 7) Maintain up-to-date backups and incident response plans to quickly recover from any service disruptions. These steps go beyond generic advice by focusing on configuration review, proactive monitoring, and integration controls specific to the affected service and environment.
Description
CVE-2025-49088 is a medium severity vulnerability in Pexip Infinity versions 32.0 through 37.1 prior to 37.2, affecting the One Touch Join (OTJ) service for Teams SIP Guest Join. The flaw is an improper input validation (CWE-617) that allows a remote attacker to send a crafted calendar invite to trigger a reachable assertion failure, causing the OTJ service to abort and resulting in a denial of service (DoS). Exploitation requires no authentication or user interaction but has a high attack complexity. This vulnerability impacts availability but does not affect confidentiality or integrity. No known exploits are currently reported in the wild. European organizations using Pexip Infinity for Teams SIP guest joining are at risk of service disruption. Mitigation involves upgrading to version 37.