CVE-2026-21273
Privilege escalation via crafted file opened by a user.
Is CVE-2026-21273 being exploited?
Not confirmed. CVE-2026-21273 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 0.56% probability of exploitation in the next 30 days.
How severe is CVE-2026-21273?
CVE-2026-21273 is rated High. 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-2026-21273?
Yes. A fix has been recorded for CVE-2026-21273. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-21273 affect?
CVE-2026-21273 affects Unspecified product (reported by NVD), Applications that parse user-supplied files. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-21273?
Apply vendor patches when released; block/scan untrusted files; enforce least privilege and user training.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Low‑privileged user can gain unauthorized read/write access and escalate privileges by opening a malicious file, enabling data modification or exfiltration.
Patch when possible
- affected<= 2023.0.22
- affected<= 2025.0.11
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.