CVE-2022-23852

FAUCET Score

CVE-2022-23852 describes a critical signed integer overflow vulnerability in Expat (libexpat) versions prior to 2.4.4, specifically impacting configurations with a non-zero XML_CONTEXT_BYTES. This flaw affects a range of products including Debian, NetApp, Oracle, Siemens, and Tenable. With a CVSS score of 9.8 (CRITICAL), this vulnerability is easily exploitable over the network with low attack complexity, requiring no user interaction, and can lead to complete compromise of confidentiality, integrity, and availability. Its FAUCET Risk Score of 93/100 further highlights its severe potential impact. While not currently listed in CISA's KEV catalog and lacking public Metasploit or ExploitDB modules, the vulnerability has garnered significant community attention with 12 mentions and 2 media articles, suggesting active discussion and potential for future exploitation.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 2.4.4CPE matchmatch criteria	cpe:2.3:a:libexpat_project:libexpat::::::::
		Range not provided by sourceCPE matchmatch criteria	cpe:2.3:a:netapp:clustered_data_ontap:-:::::::*
		Range not provided by sourceCPE matchmatch criteria	cpe:2.3:a:netapp:oncommand_workflow_automation:-:::::::*
		< 8.15.3CPE matchmatch criteria	cpe:2.3:a:tenable:nessus::::::::
		>= 10.0.0, < 10.1.1CPE matchmatch criteria	cpe:2.3:a:tenable:nessus::::::::

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

Exploitability Score

3.9

Impact Score

5.9

CvssVersion

3.1

Exploit Intelligence

EPSS Score

4.52%

Probability of exploitation in next 30 days

EPSS Percentile

90.5%

Percentile rank of EPSS score among Peer Group

As of 2026-07-24

Model: v2026.06.15

This CVE's current EPSS score of 0.0452 is in the 84th percentile among its peer group of 36,821 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (17)

github_advisorypatch availablevia nvd_reference

View patch

microsoftpatch availablevia msrc

Product: 18802-16820Fixed in: 2.4.4-1

microsoftpatch availablevia msrc

Product: 18788-16823Fixed in: 2.4.8-1

microsoftpatch availablevia msrc

Product: cbl2 expat 2.4.8-1 on CBL Mariner 2.0Fixed in: 2.4.8-1

microsoftpatch availablevia msrc

Product: cm1 expat 2.4.4-1 on CBL Mariner 1.0Fixed in: 2.4.4-1

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.4 Extended Update SupportFixed in: expat-0:2.2.5-4.el8_4.3

View patch

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 9Fixed in: expat-0:2.2.10-12.el9_0

View patch

redhatpatch availablevia redhat_api

Product: Text-Only JBCSFixed in: expat

View patch

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7Fixed in: expat-0:2.1.0-14.el7_9

View patch

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8Fixed in: expat-0:2.2.5-4.el8_5.3

View patch

cephvendor investigatingvia llm_extracted

d-linkvendor investigatingvia llm_extracted

humansignalvendor investigatingvia llm_extracted

hyperledgervendor investigatingvia llm_extracted

m2teamvendor investigatingvia llm_extracted

roundcubevendor investigatingvia llm_extracted

redhatend of lifevia redhat_api

Product: Red Hat Enterprise Linux 7Fixed in: xulrunner