The latest dated Modern Warfare 4 update in Infinity Ward's official notes is October 30, 2026, checked November 1. It adds Infected, raises DMZ cash to 10,000–20,000 for Dynamic Ops, 2,000 for Side Ops and 500 per completed Mission Step, and fixes specific Multiplayer and DMZ issues. Use the dated sections below to find the relevant change; an older fix or Beta note is not the latest release update.
This is a selected change guide, not a complete copy of the changelog. Open the official MW4 patch notes for every adjustment and later revisions. The check date above is not a new patch date.
Find the update that matches your problem
| Official date | Useful starting point | Scope |
|---|---|---|
| October 30 | Infected, exact DMZ cash increases, PC camo display and mission fixes | Multiplayer, DMZ and shared UI |
| October 29 | Possession, Multiplayer XP and DMZ progression fixes | Multiplayer and DMZ |
| October 28 | Weapon tuning, Quick Fix, dive movement and current known issues | Multiplayer, DMZ and shared systems |
| October 25 | Search and Destroy / Collateral kill XP and deployment checks | Multiplayer and DMZ |
| October 24 | Hijack spawns, party handling and exfil fixes | Multiplayer and DMZ |
| October 23 | Launch stability and interface fixes | Released game |
| October 21 | Changes prepared for launch | Launch baseline, not the August Beta |
For choosing a weapon after an update, use the Multiplayer Meta guide. For mode rules, use the Multiplayer guide; the notes record changes rather than teach every mode.
October 30: exact DMZ rewards and targeted fixes
The October 30 official notes give these cash values:
| Activity | Previous cash | October 30 cash |
|---|---|---|
| Dynamic Ops | 5,000–10,000 | 10,000–20,000 |
| Side Ops | 500 | 2,000 |
| Completed Mission Step | 300 | 500 per step |
The Mission Step value is per completed step. It is not a fixed total payout for every Story Mission replay; check the selected mission's reward card before deploying.
The developer lists Infected as a new Halloween party playlist. Possession was added in the October 29 notes. These are announced additions in the released game's update record; playlist rotation can still change, and the entries do not establish an exact unlock hour.
For stuck DMZ objectives, match the symptom to the fix:
- Broken Resupply: the required mission item could be missing from the marked vehicle's trunk.
- Information Power: players could sometimes be unable to buy Intel from the Boss Board, blocking the Order.
- Hunt Operator: a missing timer and incorrect objective text on the in-world marker were fixed.
Other changes address premature inactivity kicks in Search and Destroy, a Private Match black screen after auto-assign team switching, Coal exploits and server crashes. The UI fixes cover Platinum Camo progress displaying incorrectly for Marksman Rifles on PC and Calling Card Challenges showing the reward name instead of the challenge name in the Multiplayer Lobby. Neither establishes that every camo or Calling Card tracking problem is fixed.
October 29: progression and DMZ fixes
The October 29 official notes increase XP earn rates across several Multiplayer modes. They do not provide a universal multiplier or a new value for every action. That entry also announces cash increases for Dynamic Ops, Side Ops and Story Mission replays without exact payouts. The October 30 table above supplies the later activity and per-step values; it does not establish one universal replay reward.
The update fixes certain squadmate actions failing to count toward DMZ Mastery Camo Challenges. It also addresses inconsistent Encrypted Voice Log spawns for the Ears Everywhere Order, picking up a hostage after assimilation, and enemy helicopters colliding with an exfil helicopter. These are the developer's dated fixes, rather than a guarantee that every later challenge or extraction problem is resolved.
The Level 37 armor reward still has an exception. The notes say the 3-Plate Armor Vest fix covers players who had not yet reached DMZ Level 37. Players who passed that level before the fix had not automatically received the missing vest, and the developer was still working on that grant.
October 28: weapon and movement changes
The weapon pass changes specific damage locations and ranges. Han 86 neck and upper-torso multipliers move from 1.1 to 1.0, while its maximum-damage range increases. M4's maximum-damage range also increases. ISO Nightshade and VEL 46 arm and hand multipliers move from 0.95 to 1.0. These are Multiplayer adjustments; do not copy them into a DMZ damage claim.
Quick Fix regeneration now stops when the player takes damage. The notes also describe a temporary 23% reduction in dive velocity to address the sprint-jump dive exploit, with a longer-term solution still being worked on. That is a specific movement change, not evidence that all movement speeds fell by 23%.
DMZ changes include Possum restrictions and fixes involving equipment, storage and progression. The wording of the Possum proximity/time restriction should be checked in the official entry before relying on it during a deployment; this page does not turn that description into a tested revival timer.
Earlier changes that still explain player questions
On October 25, kill XP in Search and Destroy and Collateral increased from 100 to 300. That does not establish that every action, playlist or total match reward tripled. DMZ's Overflow Stash must also be reconciled before the next deployment.
The October 24 list includes Hijack spawn improvements and fixes for party leaders pulling teammates out of DMZ and an exfil helicopter disappearing with players aboard. A listed fix describes the developer's change; it is not a guarantee that every later disconnect or extraction failure has the same cause or has disappeared.
Separate known issues from completed fixes
The October 28 section records these issues. At the November 1 check, the later entries do not confirm that all of them are resolved:
- Patriot XMR Platinum Camo progress displaying incorrectly even though the challenge can progress. The October 30 fix names Marksman Rifles on PC; it does not establish resolution for this assault rifle or every platform.
- Some Calling Card challenges not tracking as intended. Correcting a displayed reward name on October 30 is a different symptom from challenge tracking.
- Multiplayer Best Play selection issues.
- A Classic Prestige issue reached through DMZ menus: the notes say affected players must delete previous MP classes containing relocked items before making new ones.
Read the exact entry before changing a saved class. A display problem, missing progress and a locked loadout are different symptoms. Keep the platform, mode and challenge name with any support report, and check the official notes again before treating this dated list as current.
Check the right game and update
- Confirm the title is Modern Warfare 4 (2026), rather than Call of Duty 4 (2007), MWIII or another Call of Duty release.
- Match the mode and dated section to the symptom. A Multiplayer balance table does not establish DMZ tuning.
- Distinguish the official August/September Beta notes from the October release notes.
- Follow the official patch page for later edits. Download sizes and platform version numbers are not established by this guide.
For the next content season rather than a repair update, see MW4's Warzone integration and Season 1 timing.