PatchTheCEVCVE-2026-104935: Ivanti Connect Secure Authentication Bypass by Spoofing Vulnerability
91
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HIGH 8.6EXPLOITEDREMOTEUPGRADE
CVE-2026-104935 is a high-severity flaw (CVSS 8.6) affecting connect secure, reported as exploited in the wild. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Authentication bypass by spoofing in ICS before version 25.1.3.0 allows a remote unauthenticated attacker to execute arbitrary commands. This does not impact ICS version 22.7R2.14 or prior.
Why this priority
- High severity
- EPSS top 2%: very likely to be exploited
- Exploited in the wild (CISA KEV)
- Covered by 4 security sources
- CISA SSVC: automatable with total technical impact
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.6 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 26.0% (top 2%) |
| CISA exploited list | Yes, fix due 2026-10-16 |
| Weakness | CWE-290 |
| Published | 2026-10-13 |
| Last modified | 2026-10-13 |
Am I affected?
Timeline
- Exploited Added to the CISA Known Exploited Vulnerabilities list
- Published CVE record published
- Updated Record last modified
- Deadline CISA due date for US federal agencies to patch
ivanti connect secure UPGRADE
Affected: >= 25.1.0.0 and < 25.1.1.2 · >= 25.1.2.0 and < 25.1.3.0 · 22.8 r2 · 22.8 r2.1 · 22.8 r2.2 · 22.8 r2.3 · 22.8 r2.4
Fixed in: 25.1.1.2, 25.1.3.0
Safe to downgrade to: a release before 22.8
1. Check installed version
apt-cache policy connect-secure || rpm -q connect-secure || connect-secure --version
2. UPGRADE to 25.1.1.2 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade connect-secure
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade connect-secure
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 22.8 (Debian / Ubuntu)
apt-cache madison connect-secure
sudo apt install connect-secure=<VERSION_BEFORE_22.8>
sudo apt-mark hold connect-secure
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list connect-secure
sudo dnf downgrade connect-secure-<VERSION_BEFORE_22.8>
sudo dnf versionlock add connect-secure
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
Exact fixes by distribution
Fedora 46 · retext · FIXED · 8.1.0-1.fc46 · FEDORA-2026-0602a84203 · source
sudo dnf upgrade --advisory=FEDORA-2026-0602a84203
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- GitHub PoC: ApexBreach/CVE-2026-104935-Proof-of-concept (1 stars)
- GitHub PoC: 0x45dd/ivanti-cve-2026-104935-check (0 stars)
- GitHub PoC: maxprog-svg/CVE-2026-104935 (0 stars)
- Nuclei scan template: Ivanti Connect Secure <= 22.8R2.4 - Authentication Bypass via X-DSCGI-PATH Header
Advisories and coverage
Official advisories
- Canadian Cyber Centre: Ivanti security advisory (AV26-1035) - Update 1 2026-10-16
- CERT-FR Alerts: Vulnérabilité dans Ivanti Connect Secure (ICS) (14 octobre 2026) 2026-10-14
Research and news
- Dark Reading: Ivanti ICS Zero-Day Attacks Highlight Vendor Patching Hurdles 2026-10-14
- Rapid7 Blog: Ivanti Connect Secure zero-day exploited in the wild (CVE-2026-104935) 2026-10-13
Verify at the official source NVD · CVE Program · CISA KEV catalog · 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.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.