CVE-2026-4048
RCE via OS command injection in Progress ADC LoadMaster UI during file upload.
Is CVE-2026-4048 being exploited?
Not confirmed. CVE-2026-4048 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 2.1% probability of exploitation in the next 30 days.
How severe is CVE-2026-4048?
CVE-2026-4048 is rated High with a CVSS score of 8.4. 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-2026-4048?
Yes. A fix has been recorded for CVE-2026-4048. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-4048 affect?
CVE-2026-4048 affects Progress ADC LoadMaster appliances. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-4048?
Apply vendor patch/firmware update when released
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated attacker can execute arbitrary OS commands on the LoadMaster appliance via unsanitized WAF rule file input during file upload.
Patch when possible
- affected>= V7.2.49.0 and < V7.2.63.0
- affected>= V7.1.20.0 and < V7.2.63.0
- affected>= V7.2.62.0 and < V7.2.63.0
- affected>= V7.2.62.0 and < V7.2.63.0
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.