CVE-2026-11374 ManageEngine AD360 Precondition Detection Script

A detection script for the exploit precondition of CVE-2026-11374, a predictable SSO-ticket flaw that leads to unauthenticated account takeover across the ManageEngine AD360 suite. The four in-scope products share the ManageEngineADSFramework:

Product	Affected build	Fixed build
ADSelfService Plus	≤ 6528	6529
RecoveryManager Plus	≤ 6320	6321
M365 Manager Plus	≤ 4816	4817
ADAudit Plus	≤ 8702	8703

In affected builds the SSO ticket is just System.currentTimeMillis() (a predictable timestamp) sampled at the victim's login, so it can be replayed through the CUSTOM_SSO_TICKET cookie to hijack that session. The fix replaces the ticket with UUID.randomUUID() (a sufficiently random identifier). The replay path is only reachable when the product is AD360-integrated: ADSFilter gates it on isProductIntegrated(). That gate is the precondition this tool checks for.

NOTE: this detector confirms the precondition, not the vulnerability itself. A POTENTIALLY_AFFECTED result is not a confirmed-vulnerable verdict — see below for more info.

Is it safe to run?

Yes. It's built for production and assessment use.

Nothing is exploited. The probe sends an invalid SSO ticket (1700000000000, a millisecond value far enough in the past that it can never be cache-resident), so no session is ever recovered. The server just tells us to clear the cookies we sent.
No target state changes. Every request is a plain GET, and the only cookies affected are the throwaway ones the tool sends.
No brute forcing or session resolution. The tool does not attempt the active timestamp-ticket resolution that would prove exploitability; that's exploitation rather than detection, and it's out of scope here (see Limitations).

What this can and cannot tell you

CVE-2026-11374's patch changed only how the ticket is generated (milliseconds to UUID); it did not change the cookie-replay path this probe exercises. As a result, a patched install responds byte-for-byte identically to a vulnerable one for any unauthenticated request.

What the tool can do, unauthenticated and non-destructively:

Confirm that a reachable in-scope product has the CustomSSO cookie-replay path active (that is, it is AD360-integrated), which is the CVE-2026-11374 exploit precondition.
Identify which of the four products it is, from the per-product session cookie.
Make a best-effort read of an asset build number as a hint. This is available on ADSelfService Plus, ADAudit Plus, and M365 Manager Plus; unavailable on RecoveryManager Plus.

What it can't do:

Tell vulnerable from patched. There is no safe, passive, unauthenticated signal for it. A POTENTIALLY_AFFECTED result means the precondition is met and you should go verify the patch level, not that the host is confirmed vulnerable.
Confirm exploitability. Proving a host is actually exploitable requires observing a minted ticket's format (a 13-digit number is vulnerable, a UUID is patched, both of which need authenticated or on-host visibility), reading conf/product.conf locally, or actively resolving a live ticket (real exploitation, intentionally not implemented here).
Fully trust a below-fixed ADSelfService Plus build number. ADSSP's ?build= is sometimes the real build and sometimes a frozen placeholder that reads below the fixed build, so a below-fixed value is ambiguous and the tool marks it inconclusive. A value at or above the fixed build is still a trustworthy patched signal, since the placeholder is always too low to reach it.

Requirements

Python 3.7+ and the requests library. Install with pip install requests.

Usage

# single host (prefer a URL or host:port; ports differ per product)
./cve_2026_11374_check.py https://adssp.example.com:8888

# multiple hosts (scheme optional: https is tried first, then http)
./cve_2026_11374_check.py host-a:8081 host-b:8365

# scan a list, one target per line ('#' comments allowed), compact output
./cve_2026_11374_check.py -f targets.txt --brief

# machine-readable output for pipelines
./cve_2026_11374_check.py -f targets.txt --json > results.json

Default ports differ per product (ADSelfService Plus 8888, ADAudit Plus 8081, M365 Manager Plus 8365, RecoveryManager Plus 8090), so pass a URL or host:port. A bare host defaults to 8888.

Options

Flag	Description
`targets`	One or more `host`, `host:port`, or `https://host:port`
`-f, --targets-file FILE`	Read targets from a file (one per line; `#` comments)
`--brief`	Single aligned line per target, good for scanning many hosts
`--json`	Emit structured JSON results
`--timeout SECS`	Per-request timeout (default: 15)
`--no-build`	Skip the extra build-number request on a positive finding
`--no-color`	Disable coloured output (also honours `NO_COLOR` and non-TTY)

Examples

An AD360-integrated console (verbose, the default). The second line spells out that this is the precondition and not a vulnerable verdict; the third is the best-effort build hint:

$ ./cve_2026_11374_check.py https://adssp.example.com:8888
[!] https://adssp.example.com:8888: POTENTIALLY_AFFECTED
      ADSelfService Plus: AD360-integrated, CustomSSO replay path active - precondition met. Not confirmed vulnerable; verify patch level (fixed build 6529).
      build: 6519 (below fixed 6529 - inconclusive: ?build= may be a stale placeholder or a hotfix)

A standalone install of the same product, where the replay path isn't active:

$ ./cve_2026_11374_check.py https://adssp.example.com:8888
[+] https://adssp.example.com:8888: UNAFFECTED
      ADSelfService Plus: standalone / not AD360-integrated (no cleanup), so the replay path isn't reachable here. Verify build >= 6529 regardless.

Scanning a list with one aligned line per host (--brief). Exit status is 1 if any host is POTENTIALLY_AFFECTED, otherwise 0, which is handy in scripts. The trailing note shows the identified product, plus the build number on a finding:

$ ./cve_2026_11374_check.py -f targets.txt --brief; echo "exit: $?"
POTENTIALLY_AFFECTED  https://host-a:8888  ADSelfService Plus 6519
POTENTIALLY_AFFECTED  http://host-b:8081   ADAudit Plus 8530
UNAFFECTED            http://host-c:8365   M365 Manager Plus
UNAFFECTED            https://host-d:443
INCONCLUSIVE          http://host-e:8888   ADSelfService Plus
ERROR                 host-f:8888  timeout
exit: 1

Machine-readable output (--json). Each result carries the verdict, the state and detail behind it, the identified product, and — on a finding — a build object: build is the number found, fixed_build the threshold for that product, patch_hint the directional call (likely_patched at or above the fixed build, otherwise inconclusive), and note a short explanation:

$ ./cve_2026_11374_check.py https://host-b:8081 --json
[
  {
    "target": "https://host-b:8081",
    "state": "potentially_affected",
    "detail": "ADAudit Plus: AD360-integrated, CustomSSO replay path active - precondition met ...",
    "product": "ADAudit Plus",
    "build": { "build": "8530", "fixed_build": "8703", "patch_hint": "inconclusive", "note": "below fixed 8703 - inconclusive: may be a hotfix" },
    "verdict": "POTENTIALLY_AFFECTED"
  }
]

CVE-2026-11374-check

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