How severe is CVE-2026-2940?

CVE-2026-2940 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-2940 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-2940?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-2940 have an EU (EUVD) identifier?

Yes. CVE-2026-2940 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7550.

When was CVE-2026-2940 published?

CVE-2026-2940 was published on 2026-02-22 and last updated on 2026-06-17.

CVE-2026-2940

CVE-2026-2940 is a high-severity vulnerability with a CVSS 3.x base score of 7.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: High (CVSS 3.x base score 7.3)
CVSS v2: 7.5
CVSS v4: 5.5
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7550
Weakness: CWE-119
Published: 2026-02-22
Last modified: 2026-06-17

Description

A vulnerability was determined in Zaher1307 tiny_web_server up to 8d77b1044a0ca3a5297d8726ac8aa2cf944d481b. This affects the function tiny_web_server/tiny.c of the file tiny_web_server/tiny.c of the component URL Handler. This manipulation causes out-of-bounds write. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Continious delivery with rolling releases is used by this product. Therefore, no version details of affected nor updated releases are available. The project was informed of the problem early through an issue report but has not responded yet.

Frequently asked questions

What is CVE-2026-2940?: A vulnerability was determined in Zaher1307 tiny_web_server up to 8d77b1044a0ca3a5297d8726ac8aa2cf944d481b. This affects the function tiny_web_server/tiny.c of the file tiny_web_server/tiny.c of the component URL Handler. This manipulation causes out-of-bounds write. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Continious delivery with rolling releases is used by this product. Therefore, no version details of affected nor updated releases are available. The project was informed of the problem early through an issue report but has not responded yet.
How severe is CVE-2026-2940?: CVE-2026-2940 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-2940 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-2940?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-2940 have an EU (EUVD) identifier?: Yes. CVE-2026-2940 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7550.
When was CVE-2026-2940 published?: CVE-2026-2940 was published on 2026-02-22 and last updated on 2026-06-17.

References

Other CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities

CVE-2026-94003 — Critical (CVSS 10.0): A vulnerability has been found in Comfast CF-N1-S 2.6.0.1. Impacted is the function get_css_path_from_uri of the file…
CVE-2026-93741 — Critical (CVSS 10.0): A security flaw has been discovered in Totolink A3002MU Hh-B20211125.1046. Affected by this vulnerability is the…
CVE-2026-93740 — Critical (CVSS 10.0): A vulnerability was identified in Totolink A3002MU Hh-B20211125.1046. Affected is the function formWlEncrypt of the…
CVE-2026-86296 — Critical (CVSS 10.0): A vulnerability was determined in D-Link DIR-822A A_101. This vulnerability affects the function strcpy of the file…
CVE-2026-82542 — Critical (CVSS 10.0): A weakness has been identified in Tenda HG10 300001138. Affected by this issue is the function formIPv6Routing of the…
CVE-2026-79911 — Critical (CVSS 10.0): A security vulnerability has been detected in TOTOLINK N600R 4.3.0cu.7647_B20210106. The affected element is the…

Browse all CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities →