CVE-2026-77140
Unauthenticated POST can overwrite employee records due to missing HMAC check.
Is CVE-2026-77140 being exploited?
Not confirmed. CVE-2026-77140 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 0.24% probability of exploitation in the next 30 days.
How severe is CVE-2026-77140?
CVE-2026-77140 is rated High with a CVSS score of 8.7. 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-2026-77140?
Yes. A fix has been recorded for CVE-2026-77140. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-77140 affect?
CVE-2026-77140 affects Web application extension (employee edit/update), Employee directory modules, CMS/plugin-based sites using this extension. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-77140?
Block/update endpoint or enforce server-side HMAC/ownership checks; apply vendor patch when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attacker can send direct POST to update endpoint and overwrite employee records, enabling data tampering and impersonation.
Immediate action required
- affected>= 6.0.0 and < 6.2.0
- affected>= 5.0.0 and < 5.0.1
- affected< 4.1.1
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.