---
id: "CVE-2026-91869"
page: "https://infrastack.ai/live/CVE-2026-91869"
kind: "vulnerability"
aliases: ["CVE-2026-91869"]
title: "IBM QRadar EDR: weak rate limiting lets authenticated users bypass TOTP checks"
severity: "high"
cvss: 8.1
epss: null
exploited: false
status: "open"
category: "other"
products: [{"name": "IBM Security QRadar EDR", "fixed": ["3.12.27"], "affected": ">= 3.12, <= 3.12.26", "ecosystem": "vendor"}]
ecosystems: []
tags: ["authenticated", "ibm-qradar-edr", "mfa", "network", "other", "reaqta", "totp"]
not_affected_if: ["no-valid-account", "outside-affected-range"]
published_at: "2026-11-13T22:17:26+00:00"
first_seen_at: "2026-11-13T22:33:35+00:00"
updated_at: "2026-11-13T22:37:40+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-91869", "first_seen_at": "2026-11-13T22:33:35+00:00"}, {"source": "analyst", "url": "https://www.ibm.com/support/pages/security-bulletin-ibm-security-qradar-edr-software-has-vulnerabilities-could-allow-security-restrictions-be-bypassed-and-sensitive-information-be-disclosed", "first_seen_at": "2026-11-13T22:37:40+00:00", "cites": ["https://www.ibm.com/support/pages/security-bulletin-ibm-security-qradar-edr-software-has-vulnerabilities-could-allow-security-restrictions-be-bypassed-and-sensitive-information-be-disclosed"]}]
exploit_sources: []
---

# IBM QRadar EDR: weak rate limiting lets authenticated users bypass TOTP checks

Link for people: https://infrastack.ai/live/CVE-2026-91869 (this .md is for agents)

IBM QRadar EDR versions 3.12 through 3.12.26 do not properly rate-limit TOTP verification. A remote attacker with a valid account can keep guessing one-time codes and bypass the second-factor security restriction.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:IBM Security QRadar EDR affected >= 3.12, <= 3.12.26 fixed 3.12.27

## How to check

Check the installed IBM Security QRadar EDR (ReaQta) version. Versions 3.12 through 3.12.26 are affected; 3.12.27 is fixed. If your operator subscription uses Manual approval, check for a pending update.

## Fix

Upgrade IBM Security QRadar EDR to 3.12.27. The operator upgrades automatically under the default Automatic approval strategy; with Manual approval you must approve the update.

## Timeline

- 2026-11-13T22:33:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-91869
- 2026-11-13T22:37:40+00:00 analyst https://www.ibm.com/support/pages/security-bulletin-ibm-security-qradar-edr-software-has-vulnerabilities-could-allow-security-restrictions-be-bypassed-and-sensitive-information-be-disclosed — IBM bulletin (11 Nov 2026) confirms affected 3.12-3.12.26, fixed 3.12.27, no workarounds, network vector (AV:N, PR:L). No exploitation or PoC found; no check written (version in a running product, not repo-readable). Social search skipped (B tier, obscure).

## Documents

- [advisory] IBM Security Bulletin: QRadar EDR CVE-2026-91869 / CVE-2026-91868 (fixed in 3.12.27) https://www.ibm.com/support/pages/security-bulletin-ibm-security-qradar-edr-software-has-vulnerabilities-could-allow-security-restrictions-be-bypassed-and-sensitive-information-be-disclosed

## From the sources

IBM Security QRadar EDR 3.12 through 3.12.26 could allow a remote authenticated attacker to bypass security restrictions due to improper rate limiting on TOTP verification.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_