5.3

CVE-2026-94184: Fetchmail: fetchmail: stack-based buffer overflow in ntlm authentication (fetchmail-sa-2026-01)

Awaiting analysis
AliasesSUSE-SU-2026:4567-1SUSE-SU-2026:4604-1SUSE-SU-2026:4605-1
Published 21-09-2026Last modified 21-10-2026

Vulnerability summary

CVE-2026-94184 is a medium (CVSS 5.3) Stack-based Buffer Overflow vulnerability in fetchmail. EPSS estimates a 1.20% chance of exploitation in the next 30 days, higher than 68.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
1.20%
0%100%
Low · +0.37 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 21-09-2026
    PublishedVulnerability first disclosed.
  2. 21-10-2026
    Last modifiedVulnerability information updated.

Description

A stack-based buffer overflow flaw was found in fetchmail when built with NTLM support. A malicious or compromised mail server advertising NTLM authentication can send a crafted Type 2 challenge that causes fetchmail to write past a fixed stack buffer while building the NTLM authenticate response. This may lead to remote code execution depending on stack-frame layout, or to authentication failure or process termination under memory hardening.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

1.20%

Chance of exploitation in the next 30 days

Percentile

68%

Versus all other CVEs

30-day change

Increase +0.37 pp

From 0.82% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Suse16 products
  • fetchmail&distro=SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS< 6.4.22-150000.20.32.1
  • fetchmail&distro=SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS< 6.4.22-150000.20.32.1
  • fetchmail&distro=SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS< 6.4.22-150000.20.32.1
  • fetchmail&distro=SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS< 6.4.22-150000.20.32.1
  • fetchmail&distro=SUSE Linux Enterprise Module for Basesystem 15 SP7< 6.4.22-150600.35.6.1
Opensuse2 products
  • fetchmail&distro=openSUSE Leap 16.0< 6.5.2-160000.4.1
  • fetchmail&distro=openSUSE Tumbleweed< 6.6.8-1.1
Debian1 product
  • fetchmailAll versions (No fix recorded) | < 6.6.8-1
Ubuntu1 product
  • fetchmailAll versions (No fix recorded)

4 vendors · 20 products

References

19 links
Show all 19 references