CVE-2023-32726 | Possible buffer overread from reading DNS responses

The vulnerability is caused by improper check for check if RDLENGTH does not overflow the buffer in response from DNS server.

Published: 2023-12-18 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-32726 is rated Low Risk (32.6/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.67%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-32726

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.13% 0.67% +0.54%
2 2025-11-21 0.70% 0.13% -0.56%
3 2025-11-18 — 0.70% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-32726

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
3.9 3.1 LOW
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 0.5 3.4 [email protected]
8.1 3.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 5.9 [email protected]

Weakness enumeration for CVE-2023-32726

OS Trackers for CVE-2023-32726

vendor priority summary link
debian not yet assigned CVE-2023-32726 not yet assigned priority: Debian including 1 source packages (zabbix), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 4, open 1. https://security-tracker.debian.org/tracker/CVE-2023-32726
suse medium CVE-2023-32726 severity moderate: SUSE including 2 source package names (zabbix, zabbix-agent), 14 product×package rows across 9 product lines (SUSE Linux Enterprise High Performance Computing 12 SP5, SUSE Linux Enterprise Server 12 SP4-LTSS, … (9 product lines)): Known Not Affected 14. https://www.suse.com/security/cve/CVE-2023-32726/
ubuntu medium CVE-2023-32726 medium priority: Ubuntu including 1 source packages (zabbix), 12 status rows across 12 suites (bionic, focal, jammy, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 7, ignored 2, DNE 1, needed 1, released 1. https://ubuntu.com/security/CVE-2023-32726

Affected software / configurations for CVE-2023-32726

Vendor Product Version Raw CPE
zabbix zabbix-agent >= 5.0.0, <= 5.0.39 cpe:2.3:a:zabbix:zabbix-agent:*:*:*:*:*:*:*:*
zabbix zabbix-agent >= 6.0.0, <= 6.0.23 cpe:2.3:a:zabbix:zabbix-agent:*:*:*:*:*:*:*:*
zabbix zabbix-agent >= 6.4.0, <= 6.4.8 cpe:2.3:a:zabbix:zabbix-agent:*:*:*:*:*:*:*:*
zabbix zabbix-agent 7.0.0 cpe:2.3:a:zabbix:zabbix-agent:7.0.0:alpha1:*:*:*:*:*:*
zabbix zabbix-agent 7.0.0 cpe:2.3:a:zabbix:zabbix-agent:7.0.0:alpha6:*:*:*:*:*:*

References for CVE-2023-32726

cvelogic Threat Intelligence