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

    F456: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-6200Tenda

    A vulnerability was determined in Tenda F456 1.0.0.5. The affected element is the function formwebtypelibrary of the file /goform/webtypelibrary. This manipulation of the argument menufacturer/Go causes stack-based buffer overflow. The attack can be initiated

  • 8.8 High severity

    F456: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-6199Tenda

    A vulnerability was found in Tenda F456 1.0.0.5. Impacted is the function fromqossetting of the file /goform/qossetting. The manipulation of the argument page results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has

  • 8.8 High severity

    F456: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-6198Tenda

    A vulnerability has been found in Tenda F456 1.0.0.5. This issue affects the function fromNatStaticSetting of the file /goform/NatStaticSetting. The manipulation of the argument page leads to stack-based buffer overflow. It is possible to initiate the attack r

  • 8.8 High severity

    F456: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-6197Tenda

    A flaw has been found in Tenda F456 1.0.0.5. This vulnerability affects the function formWrlsafeset of the file /goform/AdvSetWrlsafeset. Executing a manipulation of the argument mit_ssid can lead to stack-based buffer overflow. The attack may be performed fro

  • 8.8 High severity

    F456: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-6196Tenda

    A vulnerability was detected in Tenda F456 1.0.0.5. This affects the function fromexeCommand of the file /goform/exeCommand. Performing a manipulation of the argument cmdinput results in stack-based buffer overflow. The attack is possible to be carried out rem

  • 8.8 High severity

    A3002MU: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-6194TOTOLINK

    A weakness has been identified in Totolink A3002MU B20211125.1046. Affected by this vulnerability is the function sub_410188 of the file /boafrm/formWlanSetup of the component HTTP Request Handler. This manipulation of the argument wan-url causes stack-based b

  • 8.8 High severity

    A7000R: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-6168TOTOLINK

    A flaw has been found in TOTOLINK A7000R up to 9.1.0u.6115. The affected element is the function setWiFiEasyGuestCfg of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument ssid5g causes stack-based buffer overflow. Remote exploitation of the attac

  • 8.8 High severity

    F451: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-6137Tenda

    A vulnerability was detected in Tenda F451 1.0.0.7_cn_svn7958. The affected element is the function fromAdvSetWan of the file /goform/AdvSetWan. The manipulation of the argument wanmode/PPPOEPassword results in stack-based buffer overflow. It is possible to la

  • 8.8 High severity

    F451: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-6136Tenda

    A security vulnerability has been detected in Tenda F451 1.0.0.7_cn_svn7958. Impacted is the function frmL7ImForm of the file /goform/L7Im. The manipulation of the argument page leads to stack-based buffer overflow. It is possible to initiate the attack remote

  • 8.8 High severity

    F451: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-6135Tenda

    A weakness has been identified in Tenda F451 1.0.0.7_cn_svn7958. This issue affects the function fromSetIpBind of the file /goform/SetIpBind. Executing a manipulation of the argument page can lead to stack-based buffer overflow. The attack may be performed fro

  • 8.8 High severity

    F451: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-6134Tenda

    A security flaw has been discovered in Tenda F451 1.0.0.7_cn_svn7958. This vulnerability affects the function fromqossetting of the file /goform/qossetting. Performing a manipulation of the argument qos results in stack-based buffer overflow. The attack is pos

  • 8.8 High severity

    F451: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-6133Tenda

    A vulnerability was identified in Tenda F451 1.0.0.7_cn_svn7958. This affects the function fromSafeUrlFilter of the file /goform/SafeUrlFilter. Such manipulation of the argument page leads to stack-based buffer overflow. The attack can be executed remotely. Th

  • 8.8 High severity

    F451: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-6124Tenda

    A vulnerability was determined in Tenda F451 1.0.0.7. This vulnerability affects the function fromSafeMacFilter of the file /goform/SafeMacFilter of the component httpd. Executing a manipulation of the argument page/menufacturer can lead to stack-based buffer

  • 8.8 High severity

    F451: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-6123Tenda

    A vulnerability was found in Tenda F451 1.0.0.7. This affects the function fromAddressNat of the file /goform/addressNat of the component httpd. Performing a manipulation of the argument entrys results in stack-based buffer overflow. Remote exploitation of the

  • 8.8 High severity

    F451: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-6122Tenda

    A vulnerability has been found in Tenda F451 1.0.0.7. Affected by this issue is the function frmL7ProtForm of the file /goform/L7Prot of the component httpd. Such manipulation of the argument page leads to stack-based buffer overflow. The attack may be launche

  • 8.8 High severity

    F451: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-6121Tenda

    A flaw has been found in Tenda F451 1.0.0.7. Affected by this vulnerability is the function WrlclientSet of the file /goform/WrlclientSet of the component httpd. This manipulation of the argument GO causes stack-based buffer overflow. The attack may be initiat

  • 8.8 High severity

    F451: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-6120Tenda

    A vulnerability was detected in Tenda F451 1.0.0.7. Affected is the function fromDhcpListClient of the file /goform/DhcpListClient of the component httpd. The manipulation of the argument page results in stack-based buffer overflow. The attack can be launched

  • 7.5 High severity

    Home Flex: Stack-based Buffer Overflow

    CVE-2026-4156ChargePoint

    ChargePoint Home Flex OCPP getpreq Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of ChargePoint Home Flex EV chargers. Authentication is

  • 7.8 High severity

    Notepad++: Stack-based Buffer Overflow

    CVE-2026-5525Notepad++ Project

    A stack-based buffer overflow vulnerability exists in Notepad++ version 8.9.3 in the file drop handler component. When a user drags and drops a directory path of exactly 259 characters without a trailing backslash, the application appends a backslash and null

  • 8.8 High severity

    AC9: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-6016Tenda

    A vulnerability was found in Tenda AC9 15.03.02.13. The affected element is the function decodePwd of the file /goform/WizardHandle of the component POST Request Handler. Performing a manipulation of the argument WANS results in stack-based buffer overflow. Th

  • 8.8 High severity

    AC9: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-6015Tenda

    A vulnerability has been found in Tenda AC9 15.03.02.13. Impacted is the function formQuickIndex of the file /goform/QuickIndex of the component POST Request Handler. Such manipulation of the argument PPPOEPassword leads to stack-based buffer overflow. It is p

  • 8.8 High severity

    F451: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5992Tenda

    A vulnerability was determined in Tenda F451 1.0.0.7. This affects the function fromP2pListFilter of the file /goform/P2pListFilter. This manipulation of the argument page causes stack-based buffer overflow. Remote exploitation of the attack is possible. The e

  • 8.8 High severity

    F451: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5991Tenda

    A vulnerability was found in Tenda F451 1.0.0.7. Affected by this issue is the function formWrlExtraSet of the file /goform/WrlExtraSet. The manipulation of the argument GO results in stack-based buffer overflow. The attack may be launched remotely. The exploi

  • 8.8 High severity

    F451: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5990Tenda

    A vulnerability has been found in Tenda F451 1.0.0.7. Affected by this vulnerability is the function fromSafeEmailFilter of the file /goform/SafeEmailFilter. The manipulation of the argument page leads to stack-based buffer overflow. The attack may be initiate

  • 8.8 High severity

    F451: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5989Tenda

    A flaw has been found in Tenda F451 1.0.0.7. Affected is the function fromRouteStatic of the file /goform/RouteStatic. Executing a manipulation of the argument page can lead to stack-based buffer overflow. The attack can be launched remotely. The exploit has b

  • 8.8 High severity

    F451: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5988Tenda

    A vulnerability was detected in Tenda F451 1.0.0.7. This impacts the function formWrlsafeset of the file /goform/AdvSetWrlsafeset. Performing a manipulation of the argument mit_ssid results in stack-based buffer overflow. The attack can be initiated remotely.

  • 8.0 High severity

    wolfSSL: Stack-based Buffer Overflow

    CVE-2026-5295wolfSSL

    A stack buffer overflow exists in wolfSSL's PKCS7 implementation in the wc_PKCS7_DecryptOri() function in wolfcrypt/src/pkcs7.c. When processing a CMS EnvelopedData message containing an OtherRecipientInfo (ORI) recipient, the function copies an ASN.1-parsed O

  • 7.8 High severity

    osslsigncode: Stack-based Buffer Overflow

    CVE-2026-39853Mtrojnar

    osslsigncode is a tool that implements Authenticode signing and timestamping. Prior to 2.12, A stack buffer overflow vulnerability exists in osslsigncode in several signature verification paths. During verification of a PKCS#7 signature, the code copies the di

  • 8.8 High severity

    AC15: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5830Tenda

    A vulnerability was identified in Tenda AC15 15.03.05.18. This affects the function websGetVar of the file /goform/SysToolChangePwd. Such manipulation of the argument oldPwd/newPwd/cfmPwd leads to stack-based buffer overflow. The attack can be executed remotel

  • 8.8 High severity

    DIR-645: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5815D-Link

    A vulnerability was detected in D-Link DIR-645 1.01/1.02/1.03. Impacted is the function hedwigcgi_main of the file /cgi-bin/hedwig.cgi. The manipulation results in stack-based buffer overflow. The attack can be launched remotely. The exploit is now public and

  • 8.0 High severity

    AX53 v1.0: Out-of-bounds Write

    CVE-2026-30814TP-Link

    A stack-based buffer overflow in the tmpServer module of TP-Link Archer AX53 v1.0 allows an authenticated adjacent attacker to trigger a segmentation fault and potentially execute arbitrary code via a specially crafted configuration file. Successful exploitati

  • 7.5 High severity

    Di-8003 Firmware: Stack-based Buffer Overflow

    CVE-2025-50671D-Link

    A buffer overflow vulnerability exists in D-Link DI-8003 16.07.26A1 due to improper handling of parameters in the /xwgl_ref.asp endpoint. An attacker can exploit this vulnerability by sending a crafted HTTP GET request with excessively long strings in paramete

  • 7.5 High severity

    Di-8003 Firmware: Stack-based Buffer Overflow

    CVE-2025-50664D-Link

    A buffer overflow vulnerability exists in D-Link DI-8003 16.07.26A1 due to improper handling of parameters in the /user_group.asp endpoint. The attacker can exploit this vulnerability by sending a crafted HTTP GET request with parameters name, mem, pri, and at

  • 7.5 High severity

    Di-8003 Firmware: Stack-based Buffer Overflow

    CVE-2025-50661D-Link

    A buffer overflow vulnerability exists in D-Link DI-8003 16.07.26A1 due to improper handling of multiple parameters in the /url_rule.asp endpoint. An attacker can exploit this vulnerability by sending a crafted HTTP GET request with parameters name, en, ips, u

  • 8.8 High severity

    CX12L: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5687Tenda

    A weakness has been identified in Tenda CX12L 16.03.53.12. This issue affects the function fromNatStaticSetting of the file /goform/NatStaticSetting. This manipulation of the argument page causes stack-based buffer overflow. The attack may be initiated remotel

  • 8.8 High severity

    CX12L: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5686Tenda

    A security flaw has been discovered in Tenda CX12L 16.03.53.12. This vulnerability affects the function fromRouteStatic of the file /goform/RouteStatic. The manipulation of the argument page results in stack-based buffer overflow. The attack can be launched re

  • 8.8 High severity

    CX12L: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5685Tenda

    A vulnerability was identified in Tenda CX12L 16.03.53.12. This affects the function fromAddressNat of the file /goform/addressNat. The manipulation of the argument page leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit is

  • 8.0 High severity

    CX12L: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5684Tenda

    A vulnerability was determined in Tenda CX12L 16.03.53.12. Affected by this issue is the function fromwebExcptypemanFilter of the file /goform/webExcptypemanFilter. Executing a manipulation of the argument page can lead to stack-based buffer overflow. The atta

  • 8.0 High severity

    CX12L: Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVE-2026-5683Tenda

    A vulnerability was found in Tenda CX12L 16.03.53.12. Affected by this vulnerability is the function fromP2pListFilter of the file /goform/P2pListFilter. Performing a manipulation of the argument page results in stack-based buffer overflow. The attack must ori

  • 10.0 Critical severity

    Exynos 980 Firmware: Stack-based Buffer Overflow

    CVE-2025-54328Samsung

    An issue was discovered in SMS in Samsung Mobile Processor, Wearable Processor, and Modem Exynos 980, 990, 850, 1080, 2100, 1280, 2200, 1330, 1380, 1480, 2400, 1580, 2500, 9110, W920, W930, W1000, Modem 5123, Modem 5300, and Modem 5400. A Stack-based Buffer Ov