[UPDATE] [medium] MIT Kerberos: Multiple vulnerabilities allow denial of service
An attacker can exploit multiple vulnerabilities in MIT Kerberos to conduct a denial of service attack.
CSIRTS triage
- What
- Multiple vulnerabilities allow an attacker to conduct a denial of service attack.
- Who is affected
- Deployments of MIT Kerberos are affected.
- Urgency
- Remediation is medium urgency as denial of service attacks can disrupt services.
- Action
- Update to the latest version of MIT Kerberos.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1290
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-403550.50% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 39% of all scored CVEs.
- Low exploitation riskCVE-2026-403560.50% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 39% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-40355 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-40356 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for MIT Kerberos
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- medium[UPDATE] [medium] MIT Kerberos: Vulnerability allows unspecified attackcert-bund · 2026-07-09
- medium[UPDATE] [medium] MIT Kerberos: Multiple vulnerabilities allow Denial of Servicecert-bund · 2026-07-08
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