[UPDATE] [medium] Exim and cPanel/WHM: Multiple vulnerabilities
A remote, anonymous attacker can exploit multiple vulnerabilities in Exim and cPanel/WHM to perform a denial of service attack, manipulate data, or disclose sensitive information.
CSIRTS triage
- What
- Multiple vulnerabilities in Exim and cPanel/WHM can be exploited by a remote, anonymous attacker to perform denial of service, manipulate data, or disclose sensitive information.
- Who is affected
- Deployments of Exim and cPanel/WHM are affected.
- Urgency
- Remediation is medium urgency as exploitation is not currently active but multiple vulnerabilities exist.
- Action
- Update to the latest versions of Exim and cPanel/WHM to address these vulnerabilities.
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-2026-1334
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-2026-406840.36% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 29% of all scored CVEs.
- Low exploitation riskCVE-2026-406850.32% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 25% of all scored CVEs.
- Low exploitation riskCVE-2026-406860.25% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 16% of all scored CVEs.
- Low exploitation riskCVE-2026-406870.37% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 30% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-40684 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-40685 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-40686 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-40687 | coverage & exploitation status | NVD · CVE.org |
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