Find documentation that is specific to your phone model, call control system, and language on the product support page for the Cisco Wireless IP Phone 8821 and Cisco Wireless IP Phone 8821-EX. From these pages, you can also find the Cisco Wireless IP Phone 8821 and 8821-EX Wireless LAN Deployment Guide.

See the Cisco Unified Communications Manager Documentation Guide and other publications that are specific to your Cisco Unified Communications Manager release on the product support page.

See the publications that are specific to your language, phone model, and release on the product support page for Cisco Unified Communications Manager Express.

The following list contains the severity 1, 2, and 3 defects that are open for the Cisco Wireless IP Phone 8821 and 8821-EX that use Firmware Release 11.0(6).

For more information about an individual defect, you can access the online record for the defect from the Bug Search Toolkit. You must be a registered Cisco.com user to access this online information.

Because defect status continually changes, the list reflects a snapshot of the defects that were open at the time this report was compiled. For an updated view of open defects or to view specific bugs, access the Bug Search Toolkit as described in View Caveats.

• CSCvh47665 No Secure tone played on protected phones while enable speaker

• CSCvm66028 Phone will eventually loose WiFi when roaming between 2 AP's set at 80MHz/40MHz

• CSCvm69293 Network configuration info not displayed on current wlan profile

• CSCvm74978 8821 phone sometimes couldn't receive the EAP identity request on 2.4G JFW test bed.

• CSCvn05182 UI error while enable FAC

• CSCvn18501 MLPP priority lost in session bubble during xfer/conference

• CSCvn25375 Failed to run Codenomicon TLS client test suite on 8821

• CSCvn58894 8821 Persional Directory Login should not display again after success login & exit without logout

• CSCvn63992 UI: missing SSID if in neighbor list before WLAN connection

• CSCvn81608 Java process sometimes has significant delay in receiving events from wlanmgr after OOR & In Range

• CSCvo05996 No Recording Tone heard after hold/resume several times.

• CSCvo08723 Phone not able to re-connect to highest priority WLAN profile after connect to lower priority one

• CSCvo10371 Phone did not do full authentication after deauth 7 causing call preservation

• CSCvo46442 Phone shut down when battery was showing 13%

• CSCvo74044 Hear short sharp ring tone during hold revert with Chirp1&2 ringtone and RIU session.

• CSCvo74177 Sometimes(90%) ringer is very low in hold reversion state when ringer volume is maximized

• CSCvo74782 Phone log and multimeter discrepancy when measuring battery at full charge and drained

• CSCvo74800 Voltage loss of 1V shown in phone log after boot with fully charged battery

• CSCvo82607 Wrong behavior after press red key on originator phone in conference call when failover to SRST

• CSCvp14422 Phone will not roam from 5GHz WLAN profile to 2.4GHz WLAN profile if SSID disabled via WLC

• CSCvq22593 kernel timer didn't follow the interval parameter set by user space application (wlanmgr)

• CSCvr86735 Phone does not ring for hold reverted call after disconnecting another active call

• CSCvs16657 Call is automatically muted when dock station power is disconnected

• CSCvs85963 'undefined' and 'Rcvr packets' swapping on Call statistics screen

• CSCvt02503 Phone no longer plays recording tone after a few calls

• CSCvv04725 8821 has no dial tone after fallback from srst to cucm

• CSCvv45769 8821 can't set local time from LCD if its dhcp server has option 42 configured

The following list contains the severity 1, 2, and 3 defects that are resolved for the Cisco Wireless IP Phone 8821 and 8821-EX that use Firmware Release 11.0(6).

For more information about an individual defect, you can access the online record for the defect from the Bug Search Toolkit. You must be a registered Cisco.com user to access this online information.

Because defect status continually changes, the list reflects a snapshot of the defects that were resolved at the time this report was compiled. For an updated view of resolved defects or to view specific bugs, access the Bug Search Toolkit as described in View Caveats.

• CSCvh27418 Transfer soft key shall be grey before C answer while semi-transfer is disabled

• CSCvm58907 Firmware sometimes couldn't complete the fresh association

• CSCvm87368 Phone can't get ip address when DHCP option 150 field configured with MaxLength

• CSCvm95611 XML message does not display on lock screen if http url priority is 1 or 2

• CSCvn07039 \"Error:Invalid Code in Speed dial\" not display while press SD including error FAC or CMC

• CSCvn41362 cp8821：no \"CAL Text#\" displayed in \"incoming call toast\"

• CSCvn43154 No \"details\" softkey in multi-leg call history

• CSCvn64510 Neighbor list shows multiple AP's and does not update when in Single AP mode

• CSCvn66303 Phone not vibrate while with hold or RIU session when vibrate on ring:on

• CSCvo09354 No toast message displayed after unchecking \"Logged into Huntgroup\" checkbox

• CSCvo26159 8821 failing to roam flexconnect over the air after reassoc_resp it tries to auth with previous AP

• CSCvo30508 Softkey options shouldn't be shown in line missed calls page if blank

• CSCvo32881 Both speaker icon displayed when setting auto answer with speaker on shared line

• CSCvo37017 The ring doesn't play when a call in hold revert

• CSCvo44285 Multiple Vulnerabilities in qt (CVE-2018-19870)(CVE-2018-15518)

• CSCvo45809 OpenSSH Bailout Delaying User Enumeration Vulnerability (CVE-2018-15473)

• CSCvo45811 Multiple Vulnerabilities in glibc

• CSCvo55873 CFW info on non-primary line shall not be carried to SRST

• CSCvo78333 Conference call UI display error on SRST

• CSCvp00913 After disable SSH Access from CUCM, still can access phone via SSH on rel phone

• CSCvp02109 UI got into abnormal state after exiting PRT prior to completion then back to Settings when done

• CSCvp07713 WLAN diag not showing 2.4GHz AP's in WLAN profile set for 2.4GHz

• CSCvq25311 Multiple Vulnerabilities in dbus

• CSCvq31290 BusyBox add_match Function Arbitrary Code Execution Vulnerability

• CSCvq76705 Observe battery level 99%~100% floating issue after fully charged

• CSCvq80441 Cisco 8821 Wireless IP Phone Key Negotiation of Bluetooth Vulnerability

• CSCvr06067 Dnsmasq DNS Packet Processing Buffer Overflow Vulnerability

• CSCvr30314 Multiple Vulnerabilities in linux kernel (CVE-2019-10638 and CVE-2019-10639)

• CSCvr54353 Linux Kernel CVE (CVE-2019-16413 to CVE-2019-3874)

• CSCvr55596 cURL and libcurl tftp_receive_packet() Function Heap Buffer Overflow ...

• CSCvr57950 Phone continues blinking amber after shared line answers 2nd incoming call

• CSCvr70039 Vulnerability in linux kernel (CVE-2019-11190)

• CSCvr71242 Vulnerability in linux kernel (CVE-2019-11599)

• CSCvr71414 Vulnerability in linux kernel (CVE-2019-15214)

• CSCvr76650 Vulnerability in linux kernel (CVE-2019-15916)

• CSCvr87703 Vulnerability in linux kernel (CVE-2019-15666)

• CSCvr89188 Vulnerability in linux kernel (CVE-2019-16994)

• CSCvr94805 Vulnerability in linux kernel (CVE-2019-15927)

• CSCvs22379 Single click on green button sometimes triggers Redial

• CSCvs33435 Linux Kernel Use-After-Free Vulnerability CVE-2017-10661

• CSCvs61484 Multiple Vulnerabilities in linux_kernel CVE-2018-10879

• CSCvs63233 Multiple Vulnerabilities in linux_kernel CVE-2018-5344

• CSCvs76925 libxml2 xmlParseBalancedChunkMemoryRecover Memory Leak Vulnerability

• CSCvs77087 cURL FILE: URL Creation Vulnerability

• CSCvs87896 CVE-2019-15126: WPA and WPA2 Information Disclosure Vulnerability

• CSCvs95078 Qt SVG Document Exponential XML Entity Expansion Attack Vulnerability

• CSCvt00332 CDP parameter configuration does not show on phone webpage

• CSCvt00409 Multiple Vulnerabilities in zlib 1.2.8

• CSCvt01522 8821:roaming: after re-association phone responds with ACK to frames from previous AP

• CSCvt08482 Multiple Vulnerabilities in linux_kernel CVE-2019-19252

• CSCvt16802 Unable to answer incoming call from wired headset when keypad is locked

• CSCvt27645 Cisco IP Phone Call Log Information Disclosure Vulnerability

• CSCvt81786 xpointer.c in libxml2 before 2.9.5 (as used in Apple iOS before 10, ...

• CSCvt85130 Buffer overflow in libxml2 allows remote attackers to execute arbitr ...

• CSCvt87456 WLAN chip crashing on 8821 phones due to CCKM roaming failure.

• CSCvt96006 libcurl curl_easy_unescape Heap Overflow Remote Code Execution Vulne ...

• CSCvu00767 8821 WLAN Manager is reporting no roaming candidates

• CSCvu16168 Evaluation of sl-wireless-phones for Method Confusion Pairing Vulnerability for LE and BR/EDR Implem

• CSCvu52381 CP-8821 - After AP sends a Deauth the WPA_supplicant is stuck in the disconnected state

• CSCvu74127 WLAN manager report \"No valid APs\" after a roaming is skipped during the EAP authentication

• CSCvu97168 CIAM: linux-kernel 3.0.31 (CVE-2014-2523)

• CSCvv41751 CIAM: linux-kernel 3.0.31 CVE-2016-10229