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CVE-2021-26675

28
FAUCET Score

CVE-2021-26675 describes a high-severity stack-based buffer overflow vulnerability in the dnsproxy component of ConnMan versions prior to 1.39, impacting various Linux distributions including Debian, Intel, and OpenSUSE. This flaw allows network-adjacent attackers to execute arbitrary code without user interaction, leading to potential complete compromise of confidentiality, integrity, and availability. While the CVSS score is 8.8 (HIGH), there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.39CPE matchmatch criteria
cpe:2.3:a:intel:connman:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
15.2CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.30%
Probability of exploitation in next 30 days
EPSS Percentile
67.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0130 is in the 82nd percentile among its peer group of 1,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

bugzilla.suse.com / show_bug.cgi
Issue TrackingThird Party Advisory
git.kernel.org / pub/scm/network/connman/connman.git/commit
PatchThird Party Advisory
git.kernel.org / pub/scm/network/connman/connman.git/tree/ChangeLog
Release NotesThird Party Advisory
kunnamon.io / tbone
Technical DescriptionThird Party Advisory
lists.debian.org / debian-lts-announce/2021/02/msg00013.html
Mailing ListThird Party Advisory
security.gentoo.org / glsa/202107-29
Third Party Advisory
debian.org / security/2021/dsa-4847
Third Party Advisory
openwall.com / lists/oss-security/2021/02/08/2
Mailing ListThird Party Advisory