CVE-2026-7858
Unauthenticated RCE via deserialization in Teamwork Cloud & CATIA Magic.
Is CVE-2026-7858 being exploited?
Not confirmed. CVE-2026-7858 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.54% probability of exploitation in the next 30 days.
How severe is CVE-2026-7858?
CVE-2026-7858 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-7858?
Not known from our data. No patch reference has been recorded for CVE-2026-7858, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-7858 affect?
CVE-2026-7858 affects Teamwork Cloud (No Magic) – Release 2022x to 2026x, Magic Collaboration Studio (CATIA Magic) – Release 2022x to 2026x. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-7858?
Patch when released; isolate exposure; disable unsafe deserialization.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote attacker executes arbitrary code on affected server via untrusted data deserialization.
Immediate action required
- affected>= CATIA Magic Release 2022x Golden and <= CATIA Magic Release 2022x Refresh2 HF3
- affected>= CATIA Magic Release 2024x Golden and <= CATIA Magic Release 2024x Refresh3 HF1
- affected>= CATIA Magic Release 2026x Golden and <= CATIA Magic Release 2026x Golden HF2
- affected>= No Magic Release 2022x Golden and <= No Magic Release 2022x Refresh2 HF3
- affected>= No Magic Release 2024x Golden and <= No Magic Release 2024x Refresh3 HF1
- affected>= No Magic Release 2026x Golden and <= No Magic Release 2026x Golden HF2
- affected>= No Magic Release 2022x Golden and <= No Magic Release 2022x Refresh2 HF3
- affected>= No Magic Release 2024x Golden and <= No Magic Release 2024x Refresh3 HF1
- affected>= No Magic Release 2026x Golden and <= No Magic Release 2026x Golden HF2
- affected>= No Magic Release 2022x Golden and <= No Magic Release 2022x Refresh2 HF3
- affected>= No Magic Release 2024x Golden and <= No Magic Release 2024x Refresh3 HF1
- affected>= No Magic Release 2026x Golden and <= No Magic Release 2026x Golden HF2
- affected>= No Magic Release 2022x Golden and <= No Magic Release 2022x Refresh2 HF3
- affected>= No Magic Release 2024x Golden and <= No Magic Release 2024x Refresh3 HF1
- affected>= No Magic Release 2026x Golden and <= No Magic Release 2026x Golden HF2
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.