NVD / CVE Program· CNA Absolute

CVE-2026-0517: Denial of Service in Secure Access Servers Prior to 14.20.

Noroxi assessment

Priority: Monitor (action score 24/100)

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: 0.31% (FIRST EPSS).
Someone on the same network segment can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
Fixed version: Absolute Security Secure Access 14.20.

Low priority for now. Upgrade to Absolute Security Secure Access 14.20 or later.

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

CVE-2026-0517 is a denial-of-service vulnerability in versions of Secure Access Server prior to 14.20. An attacker can send a specially crafted packet to a server and cause the server to crash

MediumCVSS 6.0 · v4.0—No exploit Fix available

Published: Jan 16, 2026
Updated: Jun 17, 2026
EPSS: 0.3% · 24th percentile
CWE: CWE-400

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 24 / 40 · 6.0 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.3%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · Absolute: 6.0; NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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

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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.

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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
absolute	secure access	cpe:2.3:a:absolute:secure_access

Affected versions

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

absolute secure accessbefore 14.20

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Absolute). Independent of NVD's CPE analysis and usually ahead of it.

Absolute Security Secure Access
- before 14.20affected · Server

Same product

absolute: all records

Other highest-scoring records for the same primary product.

CVE-2026-55402CVE-2026-55402 is an out of bounds read vulnerability in Secure Access servers prior to version 14.57.
34Monitor
CVE-2026-33445Memory management vulnerability in Secure Access servers
34Monitor
CVE-2026-40952Privilge misconfiguration in Secure Access installers
34Monitor

Published before and after this one in the same product

← EarlierCVE-2025-59595Nov 4, 2025 · CVE-2025-59595 is an internally discovered denial of service vulnerability in versions of Secure Access prior to 14.12.
32Monitor
← EarlierCVE-2025-59596Nov 4, 2025 · CVE-2025-59596 is a denial-of-service vulnerability in Secure Access Windows client versions 12.0 to 14.10 that is addressed in version 14
24Monitor
Later →CVE-2026-0518Jan 16, 2026 · XSS in Secure Access Consoles prior to 14.20
19Monitor

Remediation

Which version to upgrade to

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

Product / package	Fixed version	Source
Absolute Security Secure Access	14.20	Vendor (CNA)

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.

CVE-2026-33445180 days apartMemory management vulnerability in Secure Access servers
34Monitor
CVE-2026-33443180 days apartMemory management error in Secure Access servers prior to 14.55
28Monitor
CVE-2026-40951104 days apartMemory corruption in Secure Access Windows clients prior to 14.50
27Monitor
CVE-2026-55399180 days apartResource exhaustion vulnerability in the Secure Access publisher
20Monitor

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

Someone on the same network segment can trigger it.
No account or password is required.
No user action is required.
Special conditions such as timing or configuration are required.

If successful

Confidentiality
Integrity
Availability

Attack vector: Adjacent
Attack complexity: High
Privileges required: None
User interaction: None
Scope: X

Weakness class (CWE)

CWE-400 · Uncontrolled Resource Consumption

CVSS vector

CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

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

Fix✗ → ✓Sep 28, 2026, 10:09 PM UTC

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References

www.absolute.com/platform/security-information/vulnerability-archive/cve-2026-0517

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

All records