[UPDATE] [medium] Exim: Vulnerability allows information disclosure
A remote, anonymous attacker can exploit a vulnerability in Exim to disclose information.
CSIRTS triage
- What
- A vulnerability in Exim allows a remote, anonymous attacker to disclose information.
- Who is affected
- Deployments of Exim are affected.
- Urgency
- Remediation is medium urgency as exploitation is not currently active but the vulnerability exists.
- Action
- Update to the latest version of Exim to mitigate the vulnerability.
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-2026-1742
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-2026-488400.26% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 18% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-48840 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for Exim
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] Exim and cPanel/WHM: Multiple vulnerabilitiescert-bund · 2026-07-28
- medium[NEW] [medium] Exim: Multiple vulnerabilitiescert-bund · 2026-07-27
- highCVE-2026-66141: Exim before 4.99.5 allows .forward privilege escalation because force_command for a pipe trans…nvd · 2026-07-24
- highCVE-2026-66140: Exim before 4.99.5 allows directory traversal to access files outside of the spool area, and c…nvd · 2026-07-24
- unknownExim security advisory (AV26-737)cccs · 2026-07-22
- unknownUSN-8590-1: Exim vulnerabilitiesubuntu · 2026-07-22
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