NVD / CVE Program· CNA mitre

CVE-2023-42522: Certain WithSecure products allow a remote crash of a scanning engine via processing of an import struct in a PE file.

Noroxi assessment

Priority: Monitor (action score 30/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.61% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to CISA the attack is automatable: targets can be found by mass scanning.
According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Certain WithSecure products allow a remote crash of a scanning engine via processing of an import struct in a PE file. This affects WithSecure Client Security 15, WithSecure Server Security 15, WithSecure Email and Server Security 15, WithSecure Elements Endpoint Protection 17 and later, WithSecure Client Security for Mac 15, WithSecure Elements Endpoint Protection for Mac 17 and later, Linux Security 64 12.0 , Linux Protection 12.0, and WithSecure Atlant (formerly F-Secure Atlant) 1.0.35-1.

HighCVSS 7.5 · v3.1—No exploit No fix recorded

Published: Sep 18, 2023
Updated: Jun 17, 2026
EPSS: 0.6% · 49th percentile
CWE: CWE-400

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 30 / 40 · 7.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.6%

CISA SSVC decision

Exploitation: none
Automatable: yes
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
withsecure	client security	cpe:2.3:a:withsecure:client_security
withsecure	elements endpoint protection	cpe:2.3:a:withsecure:elements_endpoint_protection
withsecure	email and server security	cpe:2.3:a:withsecure:email_and_server_security
withsecure	server security	cpe:2.3:a:withsecure:server_security
withsecure	linux protection	cpe:2.3:a:withsecure:linux_protection
withsecure	linux security 64	cpe:2.3:a:withsecure:linux_security_64
withsecure	atlant	cpe:2.3:a:withsecure:atlant
microsoft	windows	cpe:2.3:o:microsoft:windows
apple	macos	cpe:2.3:o:apple:macos
linux	linux kernel	cpe:2.3:o:linux:linux_kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

withsecure atlant1.0.35-1
withsecure client security15
withsecure elements endpoint protection17 and later
withsecure email and server security15
withsecure linux protection12.0
withsecure linux security 6412.0
withsecure server security15

Same product

withsecure: all records

Other highest-scoring records for the same primary product.

CVE-2024-4454WithSecure Elements Endpoint Protection Link Following Local Privilege Escalation Vulnerability
31Monitor
CVE-2023-47172Certain WithSecure products allow Local Privilege Escalation.
31Monitor
CVE-2023-47264Certain WithSecure products have a buffer over-read whereby processing certain fuzz file types may cause a denial of service (DoS).
30Monitor

Published before and after this one in the same product

← EarlierCVE-2023-42526Sep 18, 2023 · Certain WithSecure products allow a remote crash of a scanning engine via decompression of crafted data files.
30Monitor
← EarlierCVE-2023-42521Sep 18, 2023 · Certain WithSecure products allow a remote crash of a scanning engine via processing of a compressed file.
30Monitor
Later →CVE-2023-42523Sep 18, 2023 · Certain WithSecure products allow a remote crash of a scanning engine via unpacking of a PE file.
30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: none
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

Weakness class (CWE)

CWE-400 · Uncontrolled Resource Consumption

CVSS vector

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

nvd-primary

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

The bug in code

The whole CWE-400 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1function expand(node) {
2  return node.children.map(expand);
3}

Fixed

1const MAX_DEPTH = 32;
2function expand(node, depth = 0) {
3  if (depth > MAX_DEPTH) throw new Error("too deep");
4  return node.children.map((c) => expand(c, depth + 1));
5}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

Endpoint Denial of ServiceT1499

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

www.withsecure.com/en/support/security-advisories

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records