diff --git a/src/Api/Vault/Controllers/CiphersController.cs b/src/Api/Vault/Controllers/CiphersController.cs
index 96de4317f..0eb646902 100644
--- a/src/Api/Vault/Controllers/CiphersController.cs
+++ b/src/Api/Vault/Controllers/CiphersController.cs
@@ -619,9 +619,39 @@ public class CiphersController : Controller
 
         var updatedCipher = await GetByIdAsync(id, userId);
         var collectionCiphers = await _collectionCipherRepository.GetManyByUserIdCipherIdAsync(userId, id, UseFlexibleCollections);
+
         return new CipherDetailsResponseModel(updatedCipher, _globalSettings, collectionCiphers);
     }
 
+    [HttpPut("{id}/collections_v2")]
+    [HttpPost("{id}/collections_v2")]
+    public async Task<OptionalCipherDetailsResponseModel> PutCollections_vNext(Guid id, [FromBody] CipherCollectionsRequestModel model)
+    {
+        var userId = _userService.GetProperUserId(User).Value;
+        var cipher = await GetByIdAsync(id, userId);
+        if (cipher == null || !cipher.OrganizationId.HasValue ||
+            !await _currentContext.OrganizationUser(cipher.OrganizationId.Value))
+        {
+            throw new NotFoundException();
+        }
+
+        await _cipherService.SaveCollectionsAsync(cipher,
+            model.CollectionIds.Select(c => new Guid(c)), userId, false);
+
+        var updatedCipher = await GetByIdAsync(id, userId);
+        var collectionCiphers = await _collectionCipherRepository.GetManyByUserIdCipherIdAsync(userId, id, UseFlexibleCollections);
+        // If a user removes the last Can Manage access of a cipher, the "updatedCipher" will return null
+        // We will be returning an "Unavailable" property so the client knows the user can no longer access this
+        var response = new OptionalCipherDetailsResponseModel()
+        {
+            Unavailable = updatedCipher is null,
+            Cipher = updatedCipher is null
+                ? null
+                : new CipherDetailsResponseModel(updatedCipher, _globalSettings, collectionCiphers)
+        };
+        return response;
+    }
+
     [HttpPut("{id}/collections-admin")]
     [HttpPost("{id}/collections-admin")]
     public async Task PutCollectionsAdmin(string id, [FromBody] CipherCollectionsRequestModel model)
diff --git a/src/Api/Vault/Models/Response/OptionalCipherDetailsResponseModel.cs b/src/Api/Vault/Models/Response/OptionalCipherDetailsResponseModel.cs
new file mode 100644
index 000000000..018185e04
--- /dev/null
+++ b/src/Api/Vault/Models/Response/OptionalCipherDetailsResponseModel.cs
@@ -0,0 +1,13 @@
+using Bit.Api.Vault.Models.Response;
+using Bit.Core.Models.Api;
+
+public class OptionalCipherDetailsResponseModel : ResponseModel
+{
+    public bool Unavailable { get; set; }
+
+    public CipherDetailsResponseModel? Cipher { get; set; }
+
+    public OptionalCipherDetailsResponseModel()
+        : base("optionalCipherDetails")
+    { }
+}
diff --git a/test/Api.Test/Vault/Controllers/CiphersControllerTests.cs b/test/Api.Test/Vault/Controllers/CiphersControllerTests.cs
index 14f42db72..13f172af6 100644
--- a/test/Api.Test/Vault/Controllers/CiphersControllerTests.cs
+++ b/test/Api.Test/Vault/Controllers/CiphersControllerTests.cs
@@ -3,9 +3,11 @@ using Bit.Api.Vault.Controllers;
 using Bit.Api.Vault.Models.Request;
 using Bit.Core;
 using Bit.Core.Context;
+using Bit.Core.Entities;
 using Bit.Core.Enums;
 using Bit.Core.Exceptions;
 using Bit.Core.Models.Data.Organizations;
+using Bit.Core.Repositories;
 using Bit.Core.Services;
 using Bit.Core.Vault.Entities;
 using Bit.Core.Vault.Models.Data;
@@ -14,7 +16,9 @@ using Bit.Core.Vault.Services;
 using Bit.Test.Common.AutoFixture;
 using Bit.Test.Common.AutoFixture.Attributes;
 using NSubstitute;
+using NSubstitute.ReturnsExtensions;
 using Xunit;
+using CipherType = Bit.Core.Vault.Enums.CipherType;
 
 namespace Bit.Api.Test.Controllers;
 
@@ -50,6 +54,92 @@ public class CiphersControllerTests
         Assert.Equal(isFavorite, result.Favorite);
     }
 
+    [Theory, BitAutoData]
+    public async Task PutCollections_vNextShouldThrowExceptionWhenCipherIsNullOrNoOrgValue(Guid id, CipherCollectionsRequestModel model, Guid userId,
+        SutProvider<CiphersController> sutProvider)
+    {
+        sutProvider.GetDependency<IUserService>().GetProperUserId(default).Returns(userId);
+        sutProvider.GetDependency<ICurrentContext>().OrganizationUser(Guid.NewGuid()).Returns(false);
+        sutProvider.GetDependency<ICipherRepository>().GetByIdAsync(id, userId, true).ReturnsNull();
+
+        var requestAction = async () => await sutProvider.Sut.PutCollections_vNext(id, model);
+
+        await Assert.ThrowsAsync<NotFoundException>(requestAction);
+    }
+
+    [Theory, BitAutoData]
+    public async Task PutCollections_vNextShouldSaveUpdatedCipher(Guid id, CipherCollectionsRequestModel model, Guid userId, SutProvider<CiphersController> sutProvider)
+    {
+        SetupUserAndOrgMocks(id, userId, sutProvider);
+        var cipherDetails = CreateCipherDetailsMock(id, userId);
+        sutProvider.GetDependency<ICipherRepository>().GetByIdAsync(id, userId, true).ReturnsForAnyArgs(cipherDetails);
+
+        sutProvider.GetDependency<ICollectionCipherRepository>().GetManyByUserIdCipherIdAsync(userId, id, Arg.Any<bool>()).Returns((ICollection<CollectionCipher>)new List<CollectionCipher>());
+        var cipherService = sutProvider.GetDependency<ICipherService>();
+
+        await sutProvider.Sut.PutCollections_vNext(id, model);
+
+        await cipherService.ReceivedWithAnyArgs().SaveCollectionsAsync(default, default, default, default);
+    }
+
+    [Theory, BitAutoData]
+    public async Task PutCollections_vNextReturnOptionalDetailsCipherUnavailableFalse(Guid id, CipherCollectionsRequestModel model, Guid userId, SutProvider<CiphersController> sutProvider)
+    {
+        SetupUserAndOrgMocks(id, userId, sutProvider);
+        var cipherDetails = CreateCipherDetailsMock(id, userId);
+        sutProvider.GetDependency<ICipherRepository>().GetByIdAsync(id, userId, true).ReturnsForAnyArgs(cipherDetails);
+
+        sutProvider.GetDependency<ICollectionCipherRepository>().GetManyByUserIdCipherIdAsync(userId, id, Arg.Any<bool>()).Returns((ICollection<CollectionCipher>)new List<CollectionCipher>());
+
+        var result = await sutProvider.Sut.PutCollections_vNext(id, model);
+
+        Assert.IsType<OptionalCipherDetailsResponseModel>(result);
+        Assert.False(result.Unavailable);
+    }
+
+    [Theory, BitAutoData]
+    public async Task PutCollections_vNextReturnOptionalDetailsCipherUnavailableTrue(Guid id, CipherCollectionsRequestModel model, Guid userId, SutProvider<CiphersController> sutProvider)
+    {
+        SetupUserAndOrgMocks(id, userId, sutProvider);
+        var cipherDetails = CreateCipherDetailsMock(id, userId);
+        sutProvider.GetDependency<ICipherRepository>().GetByIdAsync(id, userId, true).ReturnsForAnyArgs(cipherDetails, [(CipherDetails)null]);
+
+        sutProvider.GetDependency<ICollectionCipherRepository>().GetManyByUserIdCipherIdAsync(userId, id, Arg.Any<bool>()).Returns((ICollection<CollectionCipher>)new List<CollectionCipher>());
+
+        var result = await sutProvider.Sut.PutCollections_vNext(id, model);
+
+        Assert.IsType<OptionalCipherDetailsResponseModel>(result);
+        Assert.True(result.Unavailable);
+    }
+
+    private void SetupUserAndOrgMocks(Guid id, Guid userId, SutProvider<CiphersController> sutProvider)
+    {
+        sutProvider.GetDependency<IUserService>().GetProperUserId(default).ReturnsForAnyArgs(userId);
+        sutProvider.GetDependency<ICurrentContext>().OrganizationUser(default).ReturnsForAnyArgs(true);
+        sutProvider.GetDependency<ICollectionCipherRepository>().GetManyByUserIdCipherIdAsync(userId, id, Arg.Any<bool>()).Returns(new List<CollectionCipher>());
+    }
+
+    private CipherDetails CreateCipherDetailsMock(Guid id, Guid userId)
+    {
+        return new CipherDetails
+        {
+            Id = id,
+            UserId = userId,
+            OrganizationId = Guid.NewGuid(),
+            Type = CipherType.Login,
+            Data = @"
+            {
+                ""Uris"": [
+                    {
+                        ""Uri"": ""https://bitwarden.com""
+                    }
+                ],
+                ""Username"": ""testuser"",
+                ""Password"": ""securepassword123""
+            }"
+        };
+    }
+
     [Theory]
     [BitAutoData(OrganizationUserType.Admin, true, true)]
     [BitAutoData(OrganizationUserType.Owner, true, true)]