8.5

CVE-2026-75131: NetworkManager-l2tp Privilege Escalation via pppd Username Injection

Awaiting analysis
AliasesUBUNTU-CVE-2026-75131DEBIAN-CVE-2026-75131
Published 23-09-2026Last modified 23-09-2026

Vulnerability summary

CVE-2026-75131 is a high (CVSS 8.5) vulnerability in nm-l2tp networkmanager-l2tp. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7.4% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.5/10
010
High · v4.0 (CVE.org)
EPSS score
0.18%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:11802-1

Timeline

  1. 23-09-2026
    PublishedVulnerability first disclosed.
  2. 23-09-2026
    Last modifiedVulnerability information updated.

Description

NetworkManager-l2tp through 1.52.4, fixed in 1.52.6, contains a privilege escalation vulnerability that allows local users with permission to create VPN connections to execute arbitrary code as root by injecting pppd options through a crafted VPN username. Attackers can embed a double-quote character or whitespace in the username to break out of the pppd options file quoting context and include the pppd plugin directive, causing the privileged pppd process to load an attacker-controlled shared object.

CVSS metrics

7 scores · 4 sources · 2 versions

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.18% on 05-10-2026

05-10-202604-11-2026

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: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Debian1 product
  • network-manager-l2tp< 1.20.8-1+deb12u1 | < 1.20.20-2+deb13u1 | < 1.52.6-1
Nm-l2tp1 product
Ubuntu1 product
  • network-manager-l2tpAll versions (No fix recorded)

3 vendors · 3 products

References

5 links