CVE-2026-40953: CVE-2026-40953 is a heap overflow in the certificate parsing function of Secure Access clients prior to 14.55

Q: How do I fix CVE-2026-40953?

secure access: upgrade to 14.55. Exact commands for each OS are on this page.

Q: Is CVE-2026-40953 being exploited?

CVE-2026-40953 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-40953 affect?

CVE-2026-40953 affects secure access. Severity is medium (CVSS 4.4). CVE-2026-40953 is a heap overflow in the certificate parsing function of Secure Access clients prior to 14.55. Attackers with local access and administrator permissions can create a denial of service attack against the client over which the

Q: How urgent is CVE-2026-40953?

Priority 16/100. No elevated risk signals yet.

Routine

MEDIUM 4.4UPGRADE

CVE-2026-40953 is a medium-severity flaw (CVSS 4.4) affecting secure access. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CVE-2026-40953 is a heap overflow in the certificate parsing function of Secure Access clients prior to 14.55. Attackers with local access and administrator permissions can create a denial of service attack against the client over which they have control.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.4 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.1% (top 99%)
CISA exploited list	No
Weakness	CWE-787
Published	2026-07-15
Last modified	2026-10-24

Publisher (CNA): NetMotion Software · Vendor: absolute

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-15 20:16 UTCPublished CVE record published
2026-10-24 21:10 UTCUpdated Record last modified

absolute secure access UPGRADE

Affected: < 14.55

Fixed in: 14.55

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy secure-access || rpm -q secure-access || secure-access --version

2. UPGRADE to 14.55 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade secure-access

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade secure-access

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-40953?

secure access: upgrade to 14.55. Exact commands for each OS are on this page.

Is CVE-2026-40953 being exploited?

CVE-2026-40953 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-40953 affect?

CVE-2026-40953 affects secure access. Severity is medium (CVSS 4.4). CVE-2026-40953 is a heap overflow in the certificate parsing function of Secure Access clients prior to 14.55. Attackers with local access and administrator permissions can create a denial of service attack against the client over which the

How urgent is CVE-2026-40953?

Priority 16/100. No elevated risk signals yet.

Related CVEs

CVE-2026-40957 HIGH 7.5 UPGRADE o CVE-2026-40957 is a frameable content vulnerability in the Secure Access server login page prior to 14.55
CVE-2026-33445 MEDIUM 5.9 UPGRADE CVE-2026-33445 is a memory management vulnerability in Secure Access servers prior to 14.55
CVE-2026-33443 MEDIUM 5.9 UPGRADE CVE-2026-33443 is a memory management error in Secure Access servers prior to 14.55
CVE-2026-40952 HIGH 7.8 UPGRADE CVE-2026-40952 is a privilege misconfiguration in the Secure Access installer for the Windows client and serve
CVE-2026-40958 LOW 3.7 UPGRADE CVE-2026-40958 is a input validation error in Secure Access clients prior to 14.55

References

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