CVE-2026-45185CriticalConfirmedExploit available
DEB
DEB
Debian Security Advisories (DSA)
DSAs are published by the Debian Security Team for issues affecting the stable distribution. The downstream tracker (security-tracker.debian.org) additionally maps every CVE to its package-level status across all supported suites.
Region
Intl.
Updates
1 ч
License
Public Domain
Advisories covering the Debian stable and oldstable releases. Ship notes include the exact .deb version that remediates each issue.
https://www.debian.org/security/ →Share link
Anyone with the link can open this vulnerability.
Exim before 4.99.3, in certain GnuTLS configurations, has a remotely reachable use-after-free in the BDAT body parsing path. It is triggere…
CVSS
9.8
Critical
EPSS
0.01
p64
Published
2026-01-01
Updated
2026-01-01
Description
Exim before 4.99.3, in certain GnuTLS configurations, has a remotely reachable use-after-free in the BDAT body parsing path. It is triggered when a client sends a TLS close_notify mid-body during a CHUNKING transfer, followed by a final cleartext byte on the same TCP connection. This can lead to heap corruption. An unauthenticated network attacker exploiting this vulnerability could execute arbitrary code.
Tags · CWE
RCEPre-auth
CWE-416
CWE-416VariantStable
Use After Free
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
https://cwe.mitre.org/data/definitions/416.html →Open in CWE collection →Affected products
Exim 4.97–4.99.3
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Timeline
2026-01-01
Published
2026-01-01
Updated
CVSS 3.1 breakdown
Attack Vector
AV: N
Network (N)
Attack Complexity
AC: L
Low (L)
Privileges Required
PR: N
None (N)
User Interaction
UI: N
None (N)
Scope
S: U
Unchanged (U)
Confidentiality Impact
C: H
High (H)
Integrity Impact
I: H
High (H)
Availability Impact
A: H
High (H)
Exploit indicators
EPSS
0.012 · p64
Known exploited (KEV)
No
Known exploits — Сканер-ВС
CVE-2026-45185
github-poc · https://github.com/MJ-bin/POC_CVE-2026-45185
Source databases
DEB
DEB
Debian Security Advisories (DSA)
DSAs are published by the Debian Security Team for issues affecting the stable distribution. The downstream tracker (security-tracker.debian.org) additionally maps every CVE to its package-level status across all supported suites.
Region
Intl.
Updates
1 ч
License
Public Domain
Advisories covering the Debian stable and oldstable releases. Ship notes include the exact .deb version that remediates each issue.
https://www.debian.org/security/ →CVE
CVE
National Vulnerability Database
NVD is the U.S. government repository of standards-based vulnerability management data, built on top of the MITRE CVE list. Every record includes CPE applicability statements, CVSS v2 and v3.x base scores, CWE mappings and cross-references to advisories.
Region
US
Updates
15 min
License
Public Domain
Comprehensive catalog of publicly disclosed vulnerabilities with CPE matches, CVSS scoring and reference URLs. De-facto standard for cross-vendor correlation.
https://nvd.nist.gov →Related vulnerabilities
External references
https://code.exim.org/exim/wiki/wiki/EximSecurity@https://exim.org@https://exim.org/static/doc/security/CVE-2026-45185.txt@https://exim.org/static/doc/security/EXIM-Security-2026-05-01.1/@https://news.ycombinator.com/item?id=48111748@https://www.openwall.com/lists/oss-security/2026/05/12/4@https://xbow.com/blog/dead-letter-cve-2026-45185-xbow-found-rce-exim@http://www.openwall.com/lists/oss-security/2026/05/12/25https://exim.org/static/doc/security/EXIM-Security-2026-05-01.1/EXIM-Security-2026-05-01.1.txt@https://xbow.com/blog/dead-letter-cve-2026-45185-xbow-found-rce-exim@https://www.openwall.com/lists/oss-security/2026/05/12/4