# CVE-2026-104935: Ivanti Connect Secure Authentication Bypass by Spoofing Vulnerability

- Exploited (CISA KEV): yes, added 2026-10-13
- Published: 2026-10-13
- CVSS: 8.6 HIGH (v3.1)
- EPSS: 86.8% (100th percentile)
- CWE: CWE-290

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.

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | No public claim | — | — |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | No public claim | — | — |
| Fastly | No public claim | — | — |
| F5 | Rule published | 2026-10-21 | 8 |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

### F5

- 2026-10-21 · new · rule 200013235
  > Added: signature 200013235 "Ivanti Pulse Connect Secure Authentication Bypass (2)" (Authentication/Authorization Attacks, risk High), systems: Other Web Server. References: CVE-2026-104935.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog

## Our test (measured)

- OWASP Core Rule Set 4.25.0, paranoia level 1, anomaly threshold 5, default CRS settings: passed (0 of 2 requests blocked), template CVE-2026-104935, 2026-11-02
- OWASP Core Rule Set 4.25.0, paranoia level 2, anomaly threshold 5, default CRS settings: passed (0 of 2 requests blocked), template CVE-2026-104935, 2026-11-02

## Social

2 posts seen since 2026-11-02.

- x 2026-11-02: Three chained Ivanti Connect Secure zero-days (CVE-2026-104935, CVE-2026-111357, CVE-2026-118527) exploited in the wild since October 3, granting unauthenticated root access. All three are now in CISA KEV. Patches exist for all three as of October 29.  Key findings:  - The chain… (https://x.com/DFIR_Radar/status/2117346460723269668)
- x 2026-11-02: 【Ivanti VPN、3つの欠陥をつなぐ侵入】  Connect SecureのCVE-2026-104935・111357・118527をつなぎ、認証なしでroot権限を得る攻撃が確認されている。 Volexityは、ウェブシェルを残さずログを消す手口を報告し、Integrity Checkerだけでは侵害を見つけにくいと指摘した。 (https://x.com/tritree0079/status/2117377334982656133)

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

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