Common Weakness Enumeration
CWE-193
AllowedOff-by-one Error
Abstraction: Base · Status: Draft
A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.
288 vulnerabilities reference this CWE, most recent first.
CVE-2026-65927 (GCVE-0-2026-65927)
Vulnerability from cvelistv5 – Published: 2026-08-25 21:53 – Updated: 2026-08-26 15:22
VLAI
EPSS
VEX
Title
Apache Tomcat: RewriteValve [N] restarts at the second rule and may bypass access control
Summary
Off-by-one Error vulnerability in Apache Tomcat impacting the [N] flag on the rewrite valves causes rewrite processing to restart at the second rule rather than the first rule.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120.
The following versions were EOL at the time the CVE was created but are
known to be affected: from 8.5.0 through 8.5.100. Other unsupported versions may also be affected.
Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121 which fix the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 15:21 UTC
CWE
- CWE-193 - Off-by-one Error
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat |
Affected:
11.0.0-M1 , ≤ 11.0.24
(semver)
Affected: 10.1.0-M1 , ≤ 10.1.57 (semver) Affected: 9.0.0.M1 , ≤ 9.0.120 (semver) Affected: 8.5.0 , ≤ 8.5.100 (semver) Unaffected: 7.0.0 , ≤ 7.0.109 (semver) Unaffected: 0 , < 7.0.0 (semver) |
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CVE-2026-63387 (GCVE-0-2026-63387)
Vulnerability from cvelistv5 – Published: 2026-08-20 17:53 – Updated: 2026-08-25 15:12
VLAI
EPSS
VEX
Title
Libevent: Off-by-one stack buffer overflow in dnsname_to_labels via crafted DNS server response
Summary
Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent has an off-by-one stack buffer overflow in evdns.c when dnsname_to_labels formats a name-bearing DNS record at the end of the 64 KB stack buffer allocated by evdns_server_request_format_response. The final-label check permits j plus label_len plus one to equal buf_len, after which the terminating null byte is written to buf[buf_len]. A crafted DNS server response containing PTR, CNAME, MX, NS, or SOA data can trigger the one-byte out-of-bounds write and crash or corrupt the process. This issue is fixed in versions 2.1.13 and 2.2.2-alpha.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 15:11 UTC
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/libevent/libevent/security/adv… | x_refsource_CONFIRM |
| https://github.com/libevent/libevent/releases/tag… | x_refsource_MISC |
| https://github.com/libevent/libevent/releases/tag… | x_refsource_MISC |
Impacted products
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CVE-2026-58380 (GCVE-0-2026-58380)
Vulnerability from cvelistv5 – Published: 2026-07-06 13:58 – Updated: 2026-09-02 09:33
VLAI
EPSS
VEX
Title
Gimp: gimp: stack buffer overflow in pnmscanner_gettoken()
Summary
A flaw was found in GIMP's PNM file format parser. When parsing a specially crafted PNM file, the pnmscanner_gettoken() function writes a null terminator one byte past the end of a stack-allocated buffer due to an off-by-one error in the loop boundary check. This could lead to memory corruption, potentially resulting in denial of service or arbitrary code execution.
Severity
7.3 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-06 15:41 UTC
CWE
- CWE-193 - Off-by-one Error
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2026:40751 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:62507 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2026-58380 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2496135 | issue-trackingx_refsource_REDHAT |
| https://gitlab.gnome.org/GNOME/gimp/-/commit/83699817 | |
| https://gitlab.gnome.org/GNOME/gimp/-/issues/16206 |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
8100020260824165450.4c9c024f , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8::appstream |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
2:3.0.4-4.el9_8.7 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9::appstream |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
Date Public
2026-04-11 00:00
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CVE-2026-58374 (GCVE-0-2026-58374)
Vulnerability from cvelistv5 – Published: 2026-06-30 12:35 – Updated: 2026-06-30 13:38
VLAI
EPSS
VEX
Summary
In hostapd before 2.12, a missing bounds check in AP-mode Wi-Fi 7 (IEEE 802.11be) Multi-Link Operation (MLO) association request processing allows an unauthenticated attacker within wireless range to send a crafted management frame containing a malformed Multi-Link Element or Per-STA Profile subelement. In hostapd_process_ml_assoc_req() in src/ap/ieee802_11_eht.c, the received link_id field can be parsed as value 15, but the corresponding links[] storage only has valid entries for lower link IDs (0 through 14). This causes an out-of-bounds write / small memory corruption during association processing before the 4-way handshake. The attack does not require network credentials, prior authentication, or user interaction. The confirmed practical impact is denial of service through hostapd process termination. This affects hostapd v2.11 and newer development snapshots before v2.12 when built with CONFIG_IEEE80211BE enabled. The issue is fixed in hostapd v2.12 and the upstream 2026-1 fixes.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-30 13:38 UTC
CWE
- CWE-193 - Off-by-one Error
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://w1.fi/security/2026-1/missing-ml-parsing-… | vendor-advisory |
| https://w1.fi/security/2026-1/ | vendor-advisorypatch |
| https://git.w1.fi/cgit/hostap/commit/?id=46dd5a4f… | patch |
| https://git.w1.fi/cgit/hostap/commit/?id=aa9d3458… | patch |
| https://www.openwall.com/lists/oss-security/2026/… |
Impacted products
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CVE-2026-58014 (GCVE-0-2026-58014)
Vulnerability from cvelistv5 – Published: 2026-06-30 12:57 – Updated: 2026-09-15 11:37
VLAI
EPSS
VEX
Title
Glib: off-by-one error in glib/gkeyfile.c via "g_key_file_get_locale_string_list"
Summary
A flaw was found in GLib. An off-by-one error can occur in the g_key_file_get_locale_string_list function in the gkeyfile.c file when loading a key file with an empty value. This flaw can cause an out-of-bounds access of 1 byte or a denial of service when the out-of-bounds access crosses a page boundary.
Severity
7.3 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-30 18:45 UTC
CWE
- CWE-193 - Off-by-one Error
Assigner
References
22 references
Impacted products
34 products
| Vendor | Product | Version | |
|---|---|---|---|
| GNOME | GLib |
Affected:
0 , < 2.88.1
(semver)
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:2.80.4-12.el10_2.21 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support |
Unaffected:
0:2.80.4-4.el10_0.17 , < *
(rpm)
cpe:/o:redhat:enterprise_linux_eus:10.0 |
|
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support |
Unaffected:
0:2.56.1-13.el7_9.1 , < *
(rpm)
cpe:/o:redhat:rhel_els:7 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:2.70.1-9.el8_10 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8::crb |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:2.56.4-177.el8_10 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8::crb cpe:/o:redhat:enterprise_linux:8::baseos |
|
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support |
Unaffected:
0:2.56.4-10.el8_4.7 , < *
(rpm)
cpe:/o:redhat:rhel_aus:8.4::baseos cpe:/o:redhat:rhel_eus_long_life:8.4::baseos |
|
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On |
Unaffected:
0:2.56.4-10.el8_4.7 , < *
(rpm)
cpe:/o:redhat:rhel_aus:8.4::baseos cpe:/o:redhat:rhel_eus_long_life:8.4::baseos |
|
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support |
Unaffected:
0:2.56.4-158.el8_6.7 , < *
(rpm)
cpe:/o:redhat:rhel_aus:8.6::baseos cpe:/o:redhat:rhel_eus_long_life:8.6::baseos |
|
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On |
Unaffected:
0:2.56.4-158.el8_6.7 , < *
(rpm)
cpe:/o:redhat:rhel_aus:8.6::baseos cpe:/o:redhat:rhel_eus_long_life:8.6::baseos |
|
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service |
Unaffected:
0:2.56.4-165.el8_8.2 , < *
(rpm)
cpe:/o:redhat:rhel_e4s:8.8::baseos cpe:/o:redhat:rhel_tus:8.8::baseos |
|
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions |
Unaffected:
0:2.56.4-165.el8_8.2 , < *
(rpm)
cpe:/o:redhat:rhel_e4s:8.8::baseos cpe:/o:redhat:rhel_tus:8.8::baseos |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:2.68.4-19.el9_8.9 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9::appstream cpe:/a:redhat:enterprise_linux:9::crb cpe:/o:redhat:enterprise_linux:9::baseos |
|
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions |
Unaffected:
0:2.68.4-7.el9_2.7 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.2::appstream cpe:/o:redhat:rhel_e4s:9.2::baseos |
|
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions |
Unaffected:
0:2.68.4-14.el9_4.8 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.4::appstream cpe:/o:redhat:rhel_e4s:9.4::baseos |
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
0:2.68.4-16.el9_6.7 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6::appstream cpe:/a:redhat:rhel_eus:9.6::crb cpe:/o:redhat:rhel_eus:9.6::baseos |
|
| Red Hat | Red Hat OpenShift Container Platform 4.22 |
Unaffected:
4.22.9.8.202609081748-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.22::el9 |
|
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.19 |
Unaffected:
1788348522 , < *
(rpm)
cpe:/a:redhat:cert_manager:1.19::el9 |
|
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.19 |
Unaffected:
1788348571 , < *
(rpm)
cpe:/a:redhat:cert_manager:1.19::el9 |
|
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.19 |
Unaffected:
1788348594 , < *
(rpm)
cpe:/a:redhat:cert_manager:1.19::el9 |
|
| Red Hat | Red Hat Discovery 2 |
Unaffected:
1788205779 , < *
(rpm)
cpe:/a:redhat:discovery:2::el9 |
|
| Red Hat | Red Hat Discovery 2 |
Unaffected:
1788206196 , < *
(rpm)
cpe:/a:redhat:discovery:2::el9 |
|
| Red Hat | Red Hat Update Infrastructure 5 |
Unaffected:
1787241211 , < *
(rpm)
cpe:/a:redhat:rhui:5::el9 |
|
| Red Hat | Red Hat Update Infrastructure 5 |
Unaffected:
1787135742 , < *
(rpm)
cpe:/a:redhat:rhui:5::el9 |
|
| Red Hat | Red Hat Update Infrastructure 5 |
Unaffected:
1787241260 , < *
(rpm)
cpe:/a:redhat:rhui:5::el9 |
|
| Red Hat | Red Hat Update Infrastructure 5 |
Unaffected:
1788880445 , < *
(rpm)
cpe:/a:redhat:rhui:5::el9 |
|
| Red Hat | Red Hat Update Infrastructure 5 |
Unaffected:
1788880464 , < *
(rpm)
cpe:/a:redhat:rhui:5::el9 |
|
| Red Hat | Red Hat Update Infrastructure 5 |
Unaffected:
1788880456 , < *
(rpm)
cpe:/a:redhat:rhui:5::el9 |
|
| Red Hat | Red Hat Update Infrastructure 5 |
Unaffected:
1788765051 , < *
(rpm)
cpe:/a:redhat:rhui:5::el9 |
|
| Red Hat | Red Hat Update Infrastructure 5 |
Unaffected:
1788880581 , < *
(rpm)
cpe:/a:redhat:rhui:5::el9 |
|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat Hardened Images |
cpe:/a:redhat:hummingbird:1
|
Date Public
2026-04-07 00:00
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CVE-2026-57160 (GCVE-0-2026-57160)
Vulnerability from cvelistv5 – Published: 2026-09-04 17:11 – Updated: 2026-09-08 17:33
VLAI
EPSS
VEX
Title
PJSIP: SIP message header buffer overflow
Summary
PJSIP is a free and open source multimedia communication library written in C. Prior to commit d6a0e7f, a buffer overflow can occur in pjsip_generic_array_hdr_print() in pjsip/src/pjsip/sip_msg.c, the function that serializes generic array headers (such as Allow, Require, Supported, and Unsupported). Under certain output-buffer boundary conditions the function can write one byte past the end of the buffer. This is reachable mainly in applications that parse and re-serialize incoming SIP requests — for example a proxy, SBC, or B2BUA — where a remote peer can influence the serialized message. The out-of-bounds write is a single fixed byte; code execution and information disclosure are not demonstrated, and in typical pool-based allocations the byte falls within allocation slack. This issue has been patched via commit d6a0e7f.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 16:50 UTC
CWE
- CWE-193 - Off-by-one Error
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/pjsip/pjproject/security/advis… | x_refsource_CONFIRM |
| https://github.com/pjsip/pjproject/commit/d6a0e7f… | x_refsource_MISC |
Impacted products
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CVE-2026-56790 (GCVE-0-2026-56790)
Vulnerability from cvelistv5 – Published: 2026-06-25 18:14 – Updated: 2026-07-14 21:34 X_Open Source
VLAI
EPSS
VEX
Title
CANBoat - Off-by-One Global Buffer Overflow in searchForPgn()
Summary
CANBoat through 6.22, fixed in commit a5a22b7, contains an off-by-one global buffer overflow in the searchForPgn() function in analyzer/pgn.c that allows remote attackers to crash the application. Attackers can deliver a crafted NMEA-2000 message with an out-of-range PGN value over CAN bus or N2K-over-IP to trigger an out-of-bounds array access and denial of service.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 21:36 UTC
CWE
- CWE-193 - Off-by-one Error
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/canboat/canboat/issues/644 | technical-descriptionexploit |
| https://github.com/canboat/canboat/pull/649 | issue-tracking |
| https://github.com/canboat/canboat/commit/a5a22b7… | patch |
| https://www.vulncheck.com/advisories/canboat-off-… | third-party-advisory |
Impacted products
Date Public
2026-06-09 00:00
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CVE-2026-56787 (GCVE-0-2026-56787)
Vulnerability from cvelistv5 – Published: 2026-06-25 18:12 – Updated: 2026-07-14 21:34 X_Open Source
VLAI
EPSS
VEX
Title
RTKLIB 2.4.3 - Off-by-One Out-of-Bounds Read in decode_ssr3 via RTCM3 SSR Message
Summary
RTKLIB through 2.4.3 contains an off-by-one out-of-bounds read vulnerability in the decode_ssr3 function at src/rtcm3.c:1446 that allows remote attackers to trigger a global buffer overflow via crafted RTCM3 SSR messages with attacker-controlled signal mode fields. Remote attackers can exploit this vulnerability by sending malicious SSR correction streams over NTRIP or serial connections to cause denial of service or crash RTKLIB rovers and CORS servers.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 18:27 UTC
CWE
- CWE-193 - Off-by-one Error
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/tomojitakasu/RTKLIB/issues/798 | technical-descriptionexploit |
| https://www.vulncheck.com/advisories/rtklib-off-b… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tomojitakasu | RTKLIB |
Affected:
0 , ≤ 2.4.3
(semver)
|
Date Public
2026-06-09 00:00
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CVE-2026-55564 (GCVE-0-2026-55564)
Vulnerability from cvelistv5 – Published: 2026-08-19 17:45 – Updated: 2026-08-25 03:33
VLAI
EPSS
VEX
Title
FreeRDP: Out-of-bounds read in glyph_cache_get via crafted glyph fragments
Summary
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, the glyph_cache_get function in libfreerdp/cache/glyph.c checks whether index is greater than cache->number instead of greater than or equal to it. A malicious RDP server can use GLYPH_FRAGMENT_USE replay in update_process_glyph_fragments to make the default cache receive index 254 when cache->number is 254, reading one pointer beyond the entries array and dereferencing it as a glyph. This can crash the client and may disclose adjacent heap data. This issue is fixed in version 3.27.0.
Severity
5.4 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 03:33 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/FreeRDP/FreeRDP/security/advis… | x_refsource_CONFIRM |
| https://github.com/FreeRDP/FreeRDP/pull/12885 | x_refsource_MISC |
| https://github.com/FreeRDP/FreeRDP/commit/c293247… | x_refsource_MISC |
| https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.0 | x_refsource_MISC |
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CVE-2026-54410 (GCVE-0-2026-54410)
Vulnerability from cvelistv5 – Published: 2026-06-14 17:10 – Updated: 2026-08-10 11:43
VLAI
EPSS
VEX
Title
nanoMODBUS Off-by-One Buffer Overflow in recv_msg_header() via Crafted MBAP Length Field
Summary
nanoMODBUS through v1.23.0 contains an off-by-one buffer overflow in the recv_msg_header function of the Modbus/TCP server that allows remote unauthenticated attackers to write one attacker-controlled byte past the end of the 260-byte receive buffer by sending a crafted MBAP frame whose Length field is set to 255.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-15 17:00 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/debevv/nanoMODBUS | product |
| https://github.com/debevv/nanoMODBUS/blob/v1.23.0… | product |
| https://cwe.mitre.org/data/definitions/193.html | technical-description |
| https://cwe.mitre.org/data/definitions/787.html | technical-description |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| debevv | nanoMODBUS |
Affected:
0 , ≤ 1.23.0
(semver)
|
Date Public
2026-06-14 17:10
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"value": "A remote unauthenticated attacker who can reach a Modbus/TCP server built on nanoMODBUS can send a crafted MBAP frame with the Length field set to 255 to overflow the 260-byte receive buffer by one byte, corrupting the adjacent buf_idx field of the nmbs_t struct with an attacker-controlled value. This yields denial of service (subsequent handler calls treat the corrupted buf_idx as a register count / offset and crash, hang, or return invalid data), one-byte information disclosure on bare-metal and RTOS targets without memory protection (ARM Cortex-M, ESP32, STM32 class), and the possibility of writing to unintended register addresses on the FC16 (Write Multiple Registers) handler path. No authentication, no user interaction, and no special configuration are required."
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "YES",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"exploitMaturity": "PROOF_OF_CONCEPT",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P/AU:Y",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "LOW",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "An attacker who can reach the TCP listening port of a Modbus/TCP server built on nanoMODBUS (typically TCP/502 on industrial / OT networks) sends a single crafted MBAP frame with Length=255 to corrupt the buf_idx field of the nmbs_t struct, causing denial of service or, on memory-protection-less embedded targets, additional information disclosure or unintended register writes."
}
]
},
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.6,
"baseSeverity": "HIGH",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
},
{
"cvssV2_0": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "COMPLETE",
"baseScore": 9,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:C",
"version": "2.0"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-193",
"description": "CWE-193 Off-by-one Error",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-787",
"description": "CWE-787 Out-of-bounds Write",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-10T11:43:54.292Z",
"orgId": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c",
"shortName": "TuranSec"
},
"references": [
{
"name": "nanoMODBUS - upstream repository (vendor)",
"tags": [
"product"
],
"url": "https://github.com/debevv/nanoMODBUS"
},
{
"name": "Vulnerable bounds check at nanomodbus.c line 369 (v1.23.0)",
"tags": [
"product"
],
"url": "https://github.com/debevv/nanoMODBUS/blob/v1.23.0/nanomodbus.c#L369"
},
{
"name": "CWE-193: Off-by-one Error",
"tags": [
"technical-description"
],
"url": "https://cwe.mitre.org/data/definitions/193.html"
},
{
"name": "CWE-787: Out-of-bounds Write",
"tags": [
"technical-description"
],
"url": "https://cwe.mitre.org/data/definitions/787.html"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "nanoMODBUS Off-by-One Buffer Overflow in recv_msg_header() via Crafted MBAP Length Field",
"x_assigner_notes": "Vendor \u0027debevv\u0027 is a single-maintainer GitHub account; nanoMODBUS is MIT-licensed. The vulnerable bounds check was verified by source inspection of v1.22.0, v1.22.1, and v1.23.0 (latest at publish time) - the issue is present in all three; affected range is therefore 0 through v1.23.0 (inclusive) with defaultStatus \u0027unknown\u0027 pending vendor confirmation of a fixed release. CVSS scoring follows the submitter\u0027s CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H = 8.6) and translates to 4.0 with VC:L/VI:L/VA:H, SC/SI/SA:N (= 8.7) and 2.0 with C:P/I:P/A:C (= 9.0).",
"x_author": "Burxonov Muslimbek"
}
},
"cveMetadata": {
"assignerOrgId": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c",
"assignerShortName": "TuranSec",
"cveId": "CVE-2026-54410",
"datePublished": "2026-06-14T17:10:12.275Z",
"dateReserved": "2026-06-13T16:39:46.122Z",
"dateUpdated": "2026-08-10T11:43:54.292Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Mitigation
Implementation
When copying character arrays or using character manipulation methods, the correct size parameter must be used to account for the null terminator that needs to be added at the end of the array. Some examples of functions susceptible to this weakness in C include strcpy(), strncpy(), strcat(), strncat(), printf(), sprintf(), scanf() and sscanf().
No CAPEC attack patterns related to this CWE.