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7.4High

Sudo Project Sudo

CVE-2026-35535

In Sudo through 1.9.17p2 before 3e474c2, a failure of a setuid, setgid, or setgroups call, during a privilege drop before running the mailer, is not a fatal error and can lead to privilege escalation.

What this means for your business

  • It affects Sudo Project Sudo. It matters if your company, or a supplier that handles your data, runs it.
  • An attacker can use it only with access to the machine itself, without a login, and without anyone at your company clicking anything.
  • FIRST's prediction model gives it a 0.2% chance of attack attempts being seen in the next 30 days, ranking above 7% of all known flaws.

What to do

  1. 1Check whether your company or your suppliers run Sudo Project Sudo, and which version. The affected versions are listed further down this page.
  2. 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.

Not sure if your company is exposed?

Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.

Check if you’re exposedBook a call

Scoring

CVSS
7.4 (v3.1)
Vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-271
Assigned by
cve@mitre.org

Dates

Published
2026-04-03
Last modified
2026-09-01
Sources
NVD

Affected products

  • Sudo Project Sudo- 1.9.17, 1.9.17
  • Siemens Sinec Os- 4.0
  • Siemens Ruggedcom Rst2428pall versions

As listed in the NVD configuration data. Not a statement about your estate.

References