CyberSecBulletin

Stack-based Buffer Overflow

CWE-121

The product writes past the end of a buffer that was allocated on the stack.

We track 2,424 vulnerabilities of this type. 100% are rated high or critical, and the average CVSS score is 8.6. 20 have been exploited in real attacks.

How this weakness is prevented

  • Operation Build and Compilation: Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index checking. D3-SFCV (Stack Frame Canary Validation) from D3FEND discusses canary-based detection in detail.
  • Architecture and Design: Use an abstraction library to abstract away risky APIs. Not a complete solution.
  • Implementation: Implement and perform bounds checking on input.
  • Implementation: Do not use dangerous functions such as gets. Use safer, equivalent functions which check for boundary errors.

Latest Stack-based Buffer Overflow vulnerabilities

  • 8.8 High severity

    F9K1015: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5629Belkin

    A vulnerability was detected in Belkin F9K1015 1.00.10. The affected element is the function formSetFirewall of the file /goform/formSetFirewall. The manipulation of the argument webpage results in stack-based buffer overflow. The attack can be executed remote

  • 8.8 High severity

    F9K1015: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5628Belkin

    A security vulnerability has been detected in Belkin F9K1015 1.00.10. Impacted is the function formSetSystemSettings of the file /goform/formSetSystemSettings of the component Setting Handler. The manipulation of the argument webpage leads to stack-based buffe

  • 8.8 High severity

    F9K1015: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5614Belkin

    A security flaw has been discovered in Belkin F9K1015 1.00.10. Impacted is the function formSetPassword of the file /goform/formSetPassword. The manipulation of the argument webpage results in stack-based buffer overflow. The attack may be launched remotely. T

  • 8.8 High severity

    F9K1015: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5613Belkin

    A vulnerability was identified in Belkin F9K1015 1.00.10. This issue affects the function formReboot of the file /goform/formReboot. The manipulation of the argument webpage leads to stack-based buffer overflow. The attack may be initiated remotely. The exploi

  • 8.8 High severity

    F9K1015: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5612Belkin

    A vulnerability was determined in Belkin F9K1015 1.00.10. This vulnerability affects the function formWlEncrypt of the file /goform/formWlEncrypt. Executing a manipulation of the argument webpage can lead to stack-based buffer overflow. The attack can be launc

  • 8.8 High severity

    F9K1015: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5611Belkin

    A vulnerability was found in Belkin F9K1015 1.00.10. This affects the function formCrossBandSwitch of the file /goform/formCrossBandSwitch. Performing a manipulation of the argument webpage results in stack-based buffer overflow. The attack can be initiated re

  • 8.8 High severity

    F9K1015: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5610Belkin

    A vulnerability has been found in Belkin F9K1015 1.00.10. Affected by this issue is the function formWISP5G of the file /goform/formWISP5G. Such manipulation of the argument webpage leads to stack-based buffer overflow. It is possible to launch the attack remo

  • 8.8 High severity

    i12: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5609Tenda

    A flaw has been found in Tenda i12 1.0.0.11(3862). Affected by this vulnerability is the function formwrlSSIDset of the file /goform/wifiSSIDset of the component Parameter Handler. This manipulation of the argument index/wl_radio causes stack-based buffer over

  • 8.8 High severity

    F9K1122: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5608Belkin

    A vulnerability was detected in Belkin F9K1122 1.00.33. Affected is the function formWlanSetup of the file /goform/formWlanSetup. The manipulation of the argument webpage results in stack-based buffer overflow. The attack may be performed from remote. The expl

  • 8.8 High severity

    CH22: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5605Tenda

    A weakness has been identified in Tenda CH22 1.0.0.1. This affects the function formWrlExtraSet of the file /goform/WrlExtraSet. Executing a manipulation of the argument GO can lead to stack-based buffer overflow. The attack can be executed remotely. The explo

  • 8.8 High severity

    CH22: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5604Tenda

    A security flaw has been discovered in Tenda CH22 1.0.0.1. The impacted element is the function formCertLocalPrecreate of the file /goform/CertLocalPrecreate of the component Parameter Handler. Performing a manipulation of the argument standard results in stac

  • 8.8 High severity

    AC10: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5550Tenda

    A vulnerability was identified in Tenda AC10 16.03.10.10_multi_TDE01. This affects the function fromSysToolChangePwd of the file /bin/httpd. The manipulation leads to stack-based buffer overflow. The attack may be initiated remotely. Multiple endpoints might b

  • 8.8 High severity

    AC10: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5548Tenda

    A vulnerability was found in Tenda AC10 16.03.10.10_multi_TDE01. Affected by this vulnerability is the function fromSysToolChangePwd of the file /bin/httpd. Performing a manipulation of the argument sys.userpass results in stack-based buffer overflow. The atta

  • 8.8 High severity

    HiPER 1250GW: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5544UTT

    A security flaw has been discovered in UTT HiPER 1250GW up to 3.2.7-210907-180535. The impacted element is an unknown function of the file /goform/formRemoteControl. The manipulation of the argument Profile results in stack-based buffer overflow. The attack ca

  • 8.8 High severity

    TEW-657BRM: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5350TRENDnet

    A security flaw has been discovered in Trendnet TEW-657BRM 1.00.1. The impacted element is the function update_pcdb of the file /setup.cgi. The manipulation of the argument mac_pc_dba results in stack-based buffer overflow. The attack can be launched remotely.

  • 8.8 High severity

    TEW-657BRM: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5349TRENDnet

    A vulnerability was identified in Trendnet TEW-657BRM 1.00.1. The affected element is the function add_apcdb of the file /setup.cgi. The manipulation of the argument mac_pc_dba leads to stack-based buffer overflow. The attack can be initiated remotely. The exp

  • 8.1 High severity

    Mongoose: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5245Cesanta

    A vulnerability was found in Cesanta Mongoose up to 7.20. This impacts the function handle_mdns_record of the file mongoose.c of the component mDNS Record Handler. Performing a manipulation of the argument buf results in stack-based buffer overflow. Remote exp

  • 7.8 High severity

    V-SFT: Stack-based Buffer Overflow

    V-SFT versions 6.2.10.0 and prior contain a stack-based buffer overflow in VS6ComFile!CSaveData::_conv_AnimationItem. Opening a crafted V7 file may lead to arbitrary code execution on the affected product.

  • 7.8 High severity

    V-SFT: Stack-based Buffer Overflow

    V-SFT versions 6.2.10.0 and prior contain a stack-based buffer overflow in VS6ComFile!CV7BaseMap::WriteV7DataToRom. Opening a crafted V7 file may lead to arbitrary code execution on the affected product.

  • 8.8 High severity

    DNS-120: Out-of-bounds Write

    CVE-2026-5214D-Link

    A vulnerability was found in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L, DNS-323, DNS-325, DNS-326, DNS-327L, DNR-326, DNS-340L, DNS-343, DNS-345, DNS-726-4, DNS-1100-4, DNS-1200-05 and DNS-1550-04 up to 20260205. Impac

  • 8.8 High severity

    DNS-120: Out-of-bounds Write

    CVE-2026-5213D-Link

    A vulnerability was determined in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L, DNS-323, DNS-325, DNS-326, DNS-327L, DNR-326, DNS-340L, DNS-343, DNS-345, DNS-726-4, DNS-1100-4, DNS-1200-05 and DNS-1550-04 up to 20260205.

  • 8.8 High severity

    DNS-120: Out-of-bounds Write

    CVE-2026-5212D-Link

    A vulnerability has been found in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L, DNS-323, DNS-325, DNS-326, DNS-327L, DNR-326, DNS-340L, DNS-343, DNS-345, DNS-726-4, DNS-1100-4, DNS-1200-05 and DNS-1550-04 up to 20260205.

  • 8.8 High severity

    DNS-120: Out-of-bounds Write

    CVE-2026-5211D-Link

    A flaw has been found in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L, DNS-323, DNS-325, DNS-326, DNS-327L, DNR-326, DNS-340L, DNS-343, DNS-345, DNS-726-4, DNS-1100-4, DNS-1200-05 and DNS-1550-04 up to 20260205. This vuln

  • 8.8 High severity

    CH22: Out-of-bounds Write

    CVE-2026-5204TendaEPSS 2.52%

    A vulnerability was determined in Tenda CH22 1.0.0.1. Affected is the function formWebTypeLibrary of the file /goform/webtypelibrary of the component Parameter Handler. This manipulation of the argument webSiteId causes stack-based buffer overflow. The attack

  • 8.8 High severity

    CH22: Out-of-bounds Write

    CVE-2026-5156Tenda

    A vulnerability was determined in Tenda CH22 1.0.0.1. This impacts the function formQuickIndex of the file /goform/QuickIndex of the component Parameter Handler. This manipulation of the argument mit_linktype causes stack-based buffer overflow. The attack is p

  • 8.8 High severity

    CH22: Out-of-bounds Write

    CVE-2026-5155Tenda

    A vulnerability was found in Tenda CH22 1.0.0.1. This affects the function fromAdvSetWan of the file /goform/AdvSetWan of the component Parameter Handler. The manipulation of the argument wanmode results in stack-based buffer overflow. The attack can be execut

  • 8.8 High severity

    CH22: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5154Tenda

    A vulnerability has been found in Tenda CH22 1.0.0.1/1.If. The impacted element is the function fromSetCfm of the file /goform/setcfm of the component Parameter Handler. The manipulation of the argument funcname leads to stack-based buffer overflow. Remote exp

  • 8.8 High severity

    CH22: Out-of-bounds Write

    CVE-2026-5152Tenda

    A vulnerability was detected in Tenda CH22 1.0.0.1. Impacted is the function formCreateFileName of the file /goform/createFileName. Performing a manipulation of the argument fileNameMit results in stack-based buffer overflow. The attack may be initiated remote

  • 8.8 High severity

    FH1201: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5046Tenda

    A flaw has been found in Tenda FH1201 1.2.0.14(408). Affected is the function formWrlExtraSet of the file /goform/WrlExtraSet of the component Parameter Handler. Executing a manipulation of the argument GO can lead to stack-based buffer overflow. The attack ma

  • 8.8 High severity

    FH1201: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5045Tenda

    A vulnerability was detected in Tenda FH1201 1.2.0.14(408). This impacts the function WrlclientSet of the file /goform/WrlclientSet of the component Parameter Handler. Performing a manipulation of the argument GO results in stack-based buffer overflow. The att

  • 8.8 High severity

    F9K1122: Out-of-bounds Write

    CVE-2026-5044Belkin

    A security vulnerability has been detected in Belkin F9K1122 1.00.33. This affects the function formSetSystemSettings of the file /goform/formSetSystemSettings of the component Setting Handler. Such manipulation of the argument webpage leads to stack-based buf

  • 8.8 High severity

    F9K1122: Out-of-bounds Write

    CVE-2026-5043Belkin

    A weakness has been identified in Belkin F9K1122 1.00.33. The impacted element is the function formSetPassword of the file /goform/formSetPassword of the component Parameter Handler. This manipulation of the argument webpage causes stack-based buffer overflow.

  • 8.8 High severity

    F9K1122: Out-of-bounds Write

    CVE-2026-5042Belkin

    A security flaw has been discovered in Belkin F9K1122 1.00.33. The affected element is the function formCrossBandSwitch of the file /goform/formCrossBandSwitch of the component Parameter Handler. The manipulation of the argument webpage results in stack-based

  • 8.8 High severity

    4G06: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5036Tenda

    A vulnerability was found in Tenda 4G06 04.06.01.29. This vulnerability affects the function fromDhcpListClient of the file /goform/DhcpListClient of the component Endpoint. Performing a manipulation of the argument page results in stack-based buffer overflow.

  • 8.8 High severity

    DIR-513: Out-of-bounds Write

    CVE-2026-5024D-Link

    A vulnerability was found in D-Link DIR-513 1.10. This issue affects the function formSetEmail of the file /goform/formSetEmail. Performing a manipulation of the argument curTime results in stack-based buffer overflow. The attack is possible to be carried out

  • 8.8 High severity

    F453: Out-of-bounds Write

    CVE-2026-5021Tenda

    A flaw has been found in Tenda F453 1.0.0.3. This affects the function fromPPTPUserSetting of the file /goform/PPTPUserSetting of the component httpd. This manipulation of the argument delno causes stack-based buffer overflow. Remote exploitation of the attack

  • 8.8 High severity

    WL-WN579X3-C: Out-of-bounds Write

    CVE-2026-5004WAVLINK

    A vulnerability was determined in Wavlink WL-WN579X3-C 231124. This impacts the function sub_4019FC of the file /cgi-bin/firewall.cgi of the component UPNP Handler. Executing a manipulation of the argument UpnpEnabled can lead to stack-based buffer overflow. I

  • 8.8 High severity

    AC15: Out-of-bounds Write

    CVE-2026-4975Tenda

    A vulnerability has been found in Tenda AC15 15.03.05.19. This affects the function formSetCfm of the file /goform/setcfm of the component POST Request Handler. The manipulation of the argument funcpara1 leads to stack-based buffer overflow. The attack can be

  • 8.8 High severity

    AC7: Out-of-bounds Write

    CVE-2026-4974Tenda

    A flaw has been found in Tenda AC7 15.03.06.44. Affected by this issue is the function fromSetSysTime of the file /goform/SetSysTimeCfg of the component POST Request Handler. Executing a manipulation of the argument Time can lead to stack-based buffer overflow

  • 8.8 High severity

    AC6: Out-of-bounds Write

    CVE-2026-4961Tenda

    A vulnerability was identified in Tenda AC6 15.03.05.16. Affected by this vulnerability is the function formQuickIndex of the file /goform/QuickIndex of the component POST Request Handler. The manipulation of the argument PPPOEPassword leads to stack-based buf