Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-56787— RTKLIB 2.4.3 - Off-by-One Out-of-Bounds Read in decode_ssr3 via RTCM3 SSR Message

Quick assessment

Affected
tomojitakasu RTKLIB
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tomoji Takasu RTKLIB是日本Tomoji Takasu个人开发者的一个全球导航卫星系统标准与精确定位算法软件包。 Tomoji Takasu RTKLIB 2.4.3及之前版本存在数字错误漏洞，该漏洞源于decode_ssr3函数存在差一错误导致越界读取，可能允许远程攻击者通过特制RTCM3 SSR消息触发全局缓冲区溢出，进而导致拒绝服务或崩溃。

CVSS 6.5 · Medium EPSS 0.56% · P45

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
tomojitakasu RTKLIB ≤ 2.4.3 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-56787

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
RTKLIB 2.4.3 - Off-by-One Out-of-Bounds Read in decode_ssr3 via RTCM3 SSR Message
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
Off-by-one错误
Source: CVE Program / CVE List V5
Vulnerability Title
Tomoji Takasu RTKLIB 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tomoji Takasu RTKLIB是日本Tomoji Takasu个人开发者的一个全球导航卫星系统标准与精确定位算法软件包。 Tomoji Takasu RTKLIB 2.4.3及之前版本存在数字错误漏洞，该漏洞源于decode_ssr3函数存在差一错误导致越界读取，可能允许远程攻击者通过特制RTCM3 SSR消息触发全局缓冲区溢出，进而导致拒绝服务或崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
tomojitakasu RTKLIB 0 ~ 2.4.3 -

II. Public POCs for CVE-2026-56787

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-56787

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-56787 (1)

Proof of Concept for CVE-2026-56787 (1)

Same Patch Batch · tomojitakasu · 2026-06-25 · 4 CVEs total

CVE-2026-56786 9.8 CRITICAL RTKLIB 2.4.3 - Out-of-bounds Write in decode_type1033 via Crafted RTCM3 Message
CVE-2026-56789 6.5 MEDIUM RTKLIB 2.4.3 - Heap Buffer Overflow and Stack Read via Oversized RINEX Epoch Satellite Cou
CVE-2026-56788 4.4 MEDIUM RTKLIB 2.4.3 - Out-of-bounds Read via Negative Array Index in getcodepri

IV. Related Vulnerabilities

Same product: RTKLIB
Same vendor: tomojitakasu
Same weakness: CWE-193

V. Comments for CVE-2026-56787

No comments yet

Leave a comment