CVE-2017-16943

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

46.71% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 98.7% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Critical. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2017-11-25 17:00Z8 YR AGO

Last updated

2024-08-05 20:43Z2 YR AGO

Reserved

2017-11-25

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-416Use After FreeVariant

Data version

5.1

Document digest

a8aaafed8bd33d0f6cd68a6c0d190e53a8a69349f22db620a5e5b5d3570c9139

• www.securitytracker.com1039872http://www.securitytracker.com/id/1039872vdb-entryx_refsource_SECTRACK
• lists.exim.orghttps://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.htmlx_refsource_MISC
• git.exim.orghttps://git.exim.org/exim.git/commit/4090d62a4b25782129cc1643596dc2f6e8f63bdex_refsource_MISC
• openwall.comhttp://openwall.com/lists/oss-security/2017/11/25/3x_refsource_MISC
• github.comhttps://github.com/LetUsFsck/PoC-Exploit-Mirror/tree/master/CVE-2017-16944x_refsource_MISC
• openwall.comhttp://openwall.com/lists/oss-security/2017/11/25/1x_refsource_MISC
• git.exim.orghttps://git.exim.org/exim.git/commitdiff/4e6ae6235c68de243b1c2419027472d7659aa2b4x_refsource_MISC
• openwall.comhttp://openwall.com/lists/oss-security/2017/11/25/2x_refsource_MISC
• www.debian.orgDSA-4053https://www.debian.org/security/2017/dsa-4053vendor-advisoryx_refsource_DEBIAN
• bugs.exim.orghttps://bugs.exim.org/show_bug.cgi?id=2199x_refsource_MISC
• www.openwall.com[oss-security] 20210504 21Nails: Multiple vulnerabilities in Eximhttp://www.openwall.com/lists/oss-security/2021/05/04/7mailing-listx_refsource_MLIST